diff --git a/packages/schema/bind/src/bindings/assemblyscript/functions.ts b/packages/schema/bind/src/bindings/assemblyscript/functions.ts
index 12f8adfbd3..44c34685a7 100644
--- a/packages/schema/bind/src/bindings/assemblyscript/functions.ts
+++ b/packages/schema/bind/src/bindings/assemblyscript/functions.ts
@@ -1,5 +1,5 @@
-import { isBaseType, isKeyword } from "./types";
 import { MustacheFn } from "../types";
+import { isBaseType, isKeyword } from "./types";
 
 // check if any of the keywords match the property name;
 // if there's a match, insert `_` at the beginning of the property name.
@@ -67,13 +67,29 @@ export const toWasmInit: MustacheFn = () => {
     }
 
     if (type.startsWith("Map<")) {
-      const openBracketIdx = type.indexOf("<");
-      const closeBracketIdx = type.lastIndexOf(">");
-      const [key, value] = type
-        .substring(openBracketIdx + 1, closeBracketIdx)
-        .split(",")
-        .map((x) => toWasm()(x.trim(), render));
-      return `new Map<${key}, ${value}>()`;
+      const firstOpenBracketIdx = type.indexOf("<");
+      const lastCloseBracketIdx = type.lastIndexOf(">");
+      if (firstOpenBracketIdx === -1 || lastCloseBracketIdx === -1) {
+        throw new Error(`Invalid Map: ${type}`);
+      }
+
+      const keyValTypes = type.substring(
+        firstOpenBracketIdx + 1,
+        lastCloseBracketIdx
+      );
+
+      const firstCommaIdx = keyValTypes.indexOf(",");
+      if (firstCommaIdx === -1) {
+        throw new Error(`Invalid Map: ${type}`);
+      }
+
+      const keyType = keyValTypes.substring(0, firstCommaIdx).trim();
+      const valType = keyValTypes.substring(firstCommaIdx + 1).trim();
+
+      const wasmKeyType = toWasm()(keyType, (str) => str);
+      const wasmValType = toWasm()(valType, (str) => str);
+
+      return `new Map<${wasmKeyType}, ${wasmValType}>()`;
     }
 
     switch (type) {
@@ -198,23 +214,27 @@ const toWasmMap = (type: string, optional: boolean): string => {
   const firstOpenBracketIdx = type.indexOf("<");
   const lastCloseBracketIdx = type.lastIndexOf(">");
 
-  if (!(firstOpenBracketIdx !== -1 && lastCloseBracketIdx !== -1)) {
+  if (firstOpenBracketIdx === -1 || lastCloseBracketIdx === -1) {
     throw new Error(`Invalid Map: ${type}`);
   }
 
-  const keyValTypes = type
-    .substring(firstOpenBracketIdx + 1, lastCloseBracketIdx)
-    .split(",")
-    .map((x) => x.trim());
+  const keyValTypes = type.substring(
+    firstOpenBracketIdx + 1,
+    lastCloseBracketIdx
+  );
 
-  if (keyValTypes.length !== 2 || !keyValTypes[0] || !keyValTypes[1]) {
+  const firstCommaIdx = keyValTypes.indexOf(",");
+  if (firstCommaIdx === -1) {
     throw new Error(`Invalid Map: ${type}`);
   }
 
-  const keyType = toWasm()(keyValTypes[0], (str) => str);
-  const valType = toWasm()(keyValTypes[1], (str) => str);
+  const keyType = keyValTypes.substring(0, firstCommaIdx).trim();
+  const valType = keyValTypes.substring(firstCommaIdx + 1).trim();
+
+  const wasmKeyType = toWasm()(keyType, (str) => str);
+  const wasmValType = toWasm()(valType, (str) => str);
 
-  return applyOptional(`Map<${keyType}, ${valType}>`, optional, false);
+  return applyOptional(`Map<${wasmKeyType}, ${wasmValType}>`, optional, false);
 };
 
 const applyOptional = (
diff --git a/packages/schema/bind/src/bindings/rust/functions.ts b/packages/schema/bind/src/bindings/rust/functions.ts
index 67605e8445..1bf2dc995e 100644
--- a/packages/schema/bind/src/bindings/rust/functions.ts
+++ b/packages/schema/bind/src/bindings/rust/functions.ts
@@ -154,13 +154,30 @@ export const toWasmInit: MustacheFn = () => {
     }
 
     if (type.startsWith("Map<")) {
-      const openBracketIdx = type.indexOf("<");
-      const closeBracketIdx = type.lastIndexOf(">");
-      const [key, value] = type
-        .substring(openBracketIdx + 1, closeBracketIdx)
-        .split(",")
-        .map((x) => toWasm()(x.trim(), render));
-      return optionalModifier(`Map::<${key}, ${value}>::new()`);
+      const firstOpenBracketIdx = type.indexOf("<");
+      const lastCloseBracketIdx = type.lastIndexOf(">");
+
+      if (firstOpenBracketIdx === -1 || lastCloseBracketIdx === -1) {
+        throw new Error(`Invalid Map: ${type}`);
+      }
+
+      const keyValTypes = type.substring(
+        firstOpenBracketIdx + 1,
+        lastCloseBracketIdx
+      );
+
+      const firstCommaIdx = keyValTypes.indexOf(",");
+      if (firstCommaIdx === -1) {
+        throw new Error(`Invalid Map: ${type}`);
+      }
+
+      const keyType = keyValTypes.substring(0, firstCommaIdx).trim();
+      const valType = keyValTypes.substring(firstCommaIdx + 1).trim();
+
+      const wasmKeyType = toWasm()(keyType, (str) => str);
+      const wasmValType = toWasm()(valType, (str) => str);
+
+      return optionalModifier(`Map::<${wasmKeyType}, ${wasmValType}>::new()`);
     }
 
     switch (type) {
@@ -302,23 +319,27 @@ const toWasmMap = (type: string, optional: boolean): string => {
   const firstOpenBracketIdx = type.indexOf("<");
   const lastCloseBracketIdx = type.lastIndexOf(">");
 
-  if (!(firstOpenBracketIdx !== -1 && lastCloseBracketIdx !== -1)) {
+  if (firstOpenBracketIdx === -1 || lastCloseBracketIdx === -1) {
     throw new Error(`Invalid Map: ${type}`);
   }
 
-  const keyValTypes = type
-    .substring(firstOpenBracketIdx + 1, lastCloseBracketIdx)
-    .split(",")
-    .map((x) => x.trim());
+  const keyValTypes = type.substring(
+    firstOpenBracketIdx + 1,
+    lastCloseBracketIdx
+  );
 
-  if (keyValTypes.length !== 2 || !keyValTypes[0] || !keyValTypes[1]) {
+  const firstCommaIdx = keyValTypes.indexOf(",");
+  if (firstCommaIdx === -1) {
     throw new Error(`Invalid Map: ${type}`);
   }
 
-  const keyType = toWasm()(keyValTypes[0], (str) => str);
-  const valType = toWasm()(keyValTypes[1], (str) => str);
+  const keyType = keyValTypes.substring(0, firstCommaIdx).trim();
+  const valType = keyValTypes.substring(firstCommaIdx + 1).trim();
+
+  const wasmKeyType = toWasm()(keyType, (str) => str);
+  const wasmValType = toWasm()(valType, (str) => str);
 
-  return applyOptional(`Map<${keyType}, ${valType}>`, optional);
+  return applyOptional(`Map<${wasmKeyType}, ${wasmValType}>`, optional);
 };
 
 const applyOptional = (type: string, optional: boolean): string => {
diff --git a/packages/schema/bind/src/bindings/typescript/functions.ts b/packages/schema/bind/src/bindings/typescript/functions.ts
index e38b0ce3d6..1c47e7f24a 100644
--- a/packages/schema/bind/src/bindings/typescript/functions.ts
+++ b/packages/schema/bind/src/bindings/typescript/functions.ts
@@ -109,13 +109,17 @@ const toTypescriptMap = (type: string, optional: boolean): string => {
   const openAngleBracketIdx = type.indexOf("<");
   const closeAngleBracketIdx = type.lastIndexOf(">");
 
-  const [keyType, valtype] = type
-    .substring(openAngleBracketIdx + 1, closeAngleBracketIdx)
-    .split(",")
-    .map((x) => x.trim());
+  const keyValTypes = type.substring(
+    openAngleBracketIdx + 1,
+    closeAngleBracketIdx
+  );
+
+  const firstCommaIdx = keyValTypes.indexOf(",");
+  const keyType = keyValTypes.substring(0, firstCommaIdx).trim();
+  const valType = keyValTypes.substring(firstCommaIdx + 1).trim();
 
   const tsKeyType = _toTypescript(keyType, (str) => str);
-  const tsValType = _toTypescript(valtype, (str) => str, true);
+  const tsValType = _toTypescript(valType, (str) => str, true);
 
   return applyOptional(`Map<${tsKeyType}, ${tsValType}>`, optional);
 };
diff --git a/packages/test-cases/cases/bind/sanity/input/schema.graphql b/packages/test-cases/cases/bind/sanity/input/schema.graphql
index c91cdb1dab..298c8fd244 100644
--- a/packages/test-cases/cases/bind/sanity/input/schema.graphql
+++ b/packages/test-cases/cases/bind/sanity/input/schema.graphql
@@ -56,6 +56,7 @@ type Module @imports(
     optEnumArray: [CustomEnum]
     map: Map! @annotate(type: "Map<String!, Int!>!")
     mapOfArr: Map! @annotate(type: "Map<String!, [Int!]!>!")
+    mapOfMap: Map! @annotate(type: "Map<String!, Map<String!, Int!>!>!")
     mapOfObj: Map! @annotate(type: "Map<String!, AnotherType!>!")
     mapOfArrOfObj: Map! @annotate(type: "Map<String!, [AnotherType!]!>!")
   ): Int!
diff --git a/packages/test-cases/cases/bind/sanity/output/plugin-ts/module.ts b/packages/test-cases/cases/bind/sanity/output/plugin-ts/module.ts
index 6aae6c7543..d5f83d6b66 100644
--- a/packages/test-cases/cases/bind/sanity/output/plugin-ts/module.ts
+++ b/packages/test-cases/cases/bind/sanity/output/plugin-ts/module.ts
@@ -18,6 +18,7 @@ export interface Args_moduleMethod extends Record<string, unknown> {
   optEnumArray?: Array<Types.CustomEnum | null> | null;
   map: Map<Types.String, Types.Int>;
   mapOfArr: Map<Types.String, Array<Types.Int>>;
+  mapOfMap: Map<Types.String, Map<Types.String, Types.Int>>;
   mapOfObj: Map<Types.String, Types.AnotherType>;
   mapOfArrOfObj: Map<Types.String, Array<Types.AnotherType>>;
 }
diff --git a/packages/test-cases/cases/bind/sanity/output/plugin-ts/wrap.info.ts b/packages/test-cases/cases/bind/sanity/output/plugin-ts/wrap.info.ts
index 3ef889121d..aa4c46cec8 100644
--- a/packages/test-cases/cases/bind/sanity/output/plugin-ts/wrap.info.ts
+++ b/packages/test-cases/cases/bind/sanity/output/plugin-ts/wrap.info.ts
@@ -779,6 +779,72 @@ export const manifest: WrapManifest = {
             "required": true,
             "type": "Map<String, [Int]>"
           },
+          {
+            "kind": 34,
+            "map": {
+              "key": {
+                "kind": 4,
+                "name": "mapOfMap",
+                "required": true,
+                "type": "String"
+              },
+              "kind": 262146,
+              "map": {
+                "key": {
+                  "kind": 4,
+                  "name": "mapOfMap",
+                  "required": true,
+                  "type": "String"
+                },
+                "kind": 262146,
+                "name": "mapOfMap",
+                "required": true,
+                "scalar": {
+                  "kind": 4,
+                  "name": "mapOfMap",
+                  "required": true,
+                  "type": "Int"
+                },
+                "type": "Map<String, Int>",
+                "value": {
+                  "kind": 4,
+                  "name": "mapOfMap",
+                  "required": true,
+                  "type": "Int"
+                }
+              },
+              "name": "mapOfMap",
+              "required": true,
+              "type": "Map<String, Map<String, Int>>",
+              "value": {
+                "key": {
+                  "kind": 4,
+                  "name": "mapOfMap",
+                  "required": true,
+                  "type": "String"
+                },
+                "kind": 262146,
+                "name": "mapOfMap",
+                "required": true,
+                "scalar": {
+                  "kind": 4,
+                  "name": "mapOfMap",
+                  "required": true,
+                  "type": "Int"
+                },
+                "type": "Map<String, Int>",
+                "value": {
+                  "kind": 4,
+                  "name": "mapOfMap",
+                  "required": true,
+                  "type": "Int"
+                }
+              }
+            },
+            "name": "mapOfMap",
+            "required": true,
+            "type": "Map<String, Map<String, Int>>"
+          },
           {
             "kind": 34,
             "map": {
diff --git a/packages/test-cases/cases/bind/sanity/output/wasm-as/Module/serialization.ts b/packages/test-cases/cases/bind/sanity/output/wasm-as/Module/serialization.ts
index c3f3a0d5db..4fe8792357 100644
--- a/packages/test-cases/cases/bind/sanity/output/wasm-as/Module/serialization.ts
+++ b/packages/test-cases/cases/bind/sanity/output/wasm-as/Module/serialization.ts
@@ -21,6 +21,7 @@ export class Args_moduleMethod {
   optEnumArray: Array<Option<Types.CustomEnum>> | null;
   map: Map<string, i32>;
   mapOfArr: Map<string, Array<i32>>;
+  mapOfMap: Map<string, Map<string, i32>>;
   mapOfObj: Map<string, Types.AnotherType>;
   mapOfArrOfObj: Map<string, Array<Types.AnotherType>>;
 }
@@ -43,6 +44,8 @@ export function deserializemoduleMethodArgs(argsBuf: ArrayBuffer): Args_moduleMe
   let _mapSet: bool = false;
   let _mapOfArr: Map<string, Array<i32>> = new Map<string, Array<i32>>();
   let _mapOfArrSet: bool = false;
+  let _mapOfMap: Map<string, Map<string, i32>> = new Map<string, Map<string, i32>>();
+  let _mapOfMapSet: bool = false;
   let _mapOfObj: Map<string, Types.AnotherType> = new Map<string, Types.AnotherType>();
   let _mapOfObjSet: bool = false;
   let _mapOfArrOfObj: Map<string, Array<Types.AnotherType>> = new Map<string, Array<Types.AnotherType>>();
@@ -156,6 +159,20 @@ export function deserializemoduleMethodArgs(argsBuf: ArrayBuffer): Args_moduleMe
       _mapOfArrSet = true;
       reader.context().pop();
     }
+    else if (field == "mapOfMap") {
+      reader.context().push(field, "Map<string, Map<string, i32>>", "type found, reading property");
+      _mapOfMap = reader.readExtGenericMap((reader: Read): string => {
+        return reader.readString();
+      }, (reader: Read): Map<string, i32> => {
+        return reader.readExtGenericMap((reader: Read): string => {
+          return reader.readString();
+        }, (reader: Read): i32 => {
+          return reader.readInt32();
+        });
+      });
+      _mapOfMapSet = true;
+      reader.context().pop();
+    }
     else if (field == "mapOfObj") {
       reader.context().push(field, "Map<string, Types.AnotherType>", "type found, reading property");
       _mapOfObj = reader.readExtGenericMap((reader: Read): string => {
@@ -198,6 +215,9 @@ export function deserializemoduleMethodArgs(argsBuf: ArrayBuffer): Args_moduleMe
   if (!_mapOfArrSet) {
     throw new Error(reader.context().printWithContext("Missing required argument: 'mapOfArr: Map<String, [Int]>'"));
   }
+  if (!_mapOfMapSet) {
+    throw new Error(reader.context().printWithContext("Missing required argument: 'mapOfMap: Map<String, Map<String, Int>>'"));
+  }
   if (!_mapOfObjSet) {
     throw new Error(reader.context().printWithContext("Missing required argument: 'mapOfObj: Map<String, AnotherType>'"));
   }
@@ -214,6 +234,7 @@ export function deserializemoduleMethodArgs(argsBuf: ArrayBuffer): Args_moduleMe
     optEnumArray: _optEnumArray,
     map: _map,
     mapOfArr: _mapOfArr,
+    mapOfMap: _mapOfMap,
     mapOfObj: _mapOfObj,
     mapOfArrOfObj: _mapOfArrOfObj
   };
diff --git a/packages/test-cases/cases/bind/sanity/output/wasm-as/Module/wrapped.ts b/packages/test-cases/cases/bind/sanity/output/wasm-as/Module/wrapped.ts
index 6eb47467e1..9de3884c85 100644
--- a/packages/test-cases/cases/bind/sanity/output/wasm-as/Module/wrapped.ts
+++ b/packages/test-cases/cases/bind/sanity/output/wasm-as/Module/wrapped.ts
@@ -30,6 +30,7 @@ export function moduleMethodWrapped(argsBuf: ArrayBuffer, env_size: u32): ArrayB
       optEnumArray: args.optEnumArray,
       map: args.map,
       mapOfArr: args.mapOfArr,
+      mapOfMap: args.mapOfMap,
       mapOfObj: args.mapOfObj,
       mapOfArrOfObj: args.mapOfArrOfObj
     }
diff --git a/packages/test-cases/cases/bind/sanity/output/wasm-rs/module/serialization.rs b/packages/test-cases/cases/bind/sanity/output/wasm-rs/module/serialization.rs
index 73884c9578..678a6ae880 100644
--- a/packages/test-cases/cases/bind/sanity/output/wasm-rs/module/serialization.rs
+++ b/packages/test-cases/cases/bind/sanity/output/wasm-rs/module/serialization.rs
@@ -32,6 +32,7 @@ pub struct ArgsModuleMethod {
     pub opt_enum_array: Option<Vec<Option<CustomEnum>>>,
     pub map: Map<String, i32>,
     pub map_of_arr: Map<String, Vec<i32>>,
+    pub map_of_map: Map<String, Map<String, i32>>,
     pub map_of_obj: Map<String, AnotherType>,
     pub map_of_arr_of_obj: Map<String, Vec<AnotherType>>,
 }
@@ -56,6 +57,8 @@ pub fn deserialize_module_method_args(args: &[u8]) -> Result<ArgsModuleMethod, D
     let mut _map_set = false;
     let mut _map_of_arr: Map<String, Vec<i32>> = Map::<String, Vec<i32>>::new();
     let mut _map_of_arr_set = false;
+    let mut _map_of_map: Map<String, Map<String, i32>> = Map::<String, Map<String, i32>>::new();
+    let mut _map_of_map_set = false;
     let mut _map_of_obj: Map<String, AnotherType> = Map::<String, AnotherType>::new();
     let mut _map_of_obj_set = false;
     let mut _map_of_arr_of_obj: Map<String, Vec<AnotherType>> = Map::<String, Vec<AnotherType>>::new();
@@ -161,6 +164,20 @@ pub fn deserialize_module_method_args(args: &[u8]) -> Result<ArgsModuleMethod, D
                 _map_of_arr_set = true;
                 reader.context().pop();
             }
+            "mapOfMap" => {
+                reader.context().push(&field, "Map<String, Map<String, i32>>", "type found, reading argument");
+                _map_of_map = reader.read_ext_generic_map(|reader| {
+                    reader.read_string()
+                }, |reader| {
+                    reader.read_ext_generic_map(|reader| {
+                        reader.read_string()
+                    }, |reader| {
+                        reader.read_i32()
+                    })
+                })?;
+                _map_of_map_set = true;
+                reader.context().pop();
+            }
             "mapOfObj" => {
                 reader.context().push(&field, "Map<String, AnotherType>", "type found, reading argument");
                 _map_of_obj = reader.read_ext_generic_map(|reader| {
@@ -203,6 +220,9 @@ pub fn deserialize_module_method_args(args: &[u8]) -> Result<ArgsModuleMethod, D
     if !_map_of_arr_set {
         return Err(DecodeError::MissingField("mapOfArr: Map<String, [Int]>.".to_string()));
     }
+    if !_map_of_map_set {
+        return Err(DecodeError::MissingField("mapOfMap: Map<String, Map<String, Int>>.".to_string()));
+    }
     if !_map_of_obj_set {
         return Err(DecodeError::MissingField("mapOfObj: Map<String, AnotherType>.".to_string()));
     }
@@ -219,6 +239,7 @@ pub fn deserialize_module_method_args(args: &[u8]) -> Result<ArgsModuleMethod, D
         opt_enum_array: _opt_enum_array,
         map: _map,
         map_of_arr: _map_of_arr,
+        map_of_map: _map_of_map,
         map_of_obj: _map_of_obj,
         map_of_arr_of_obj: _map_of_arr_of_obj,
     })
diff --git a/packages/test-cases/cases/bind/sanity/output/wasm-rs/module/wrapped.rs b/packages/test-cases/cases/bind/sanity/output/wasm-rs/module/wrapped.rs
index c9d0121a94..3703b2204b 100644
--- a/packages/test-cases/cases/bind/sanity/output/wasm-rs/module/wrapped.rs
+++ b/packages/test-cases/cases/bind/sanity/output/wasm-rs/module/wrapped.rs
@@ -35,6 +35,7 @@ pub fn module_method_wrapped(args: &[u8], env_size: u32) -> Vec<u8> {
                 opt_enum_array: args.opt_enum_array,
                 map: args.map,
                 map_of_arr: args.map_of_arr,
+                map_of_map: args.map_of_map,
                 map_of_obj: args.map_of_obj,
                 map_of_arr_of_obj: args.map_of_arr_of_obj,
             });