diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5eea4e0b..99f649e0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -87,7 +87,7 @@ jobs:
       - run: cargo build --manifest-path tests/no-std/Cargo.toml --target thumbv6m-none-eabi
       - run: cargo build --manifest-path tests/rust-2015/Cargo.toml --target thumbv6m-none-eabi
       - run: cargo minimal-versions build --workspace --all-features --ignore-private
-        if: matrix.rust != '1.37'
+        if: matrix.rust != '1.56'
 
   miri:
     runs-on: ubuntu-latest
diff --git a/src/lib.rs b/src/lib.rs
index f81bc008..9419e288 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -11,7 +11,7 @@ Add this to your `Cargo.toml`:
 pin-project = "1"
 ```
 
-*Compiler support: requires rustc 1.37+*
+*Compiler support: requires rustc 1.56+*
 
 ## Examples