diff --git a/og_image_writer/Cargo.toml b/og_image_writer/Cargo.toml
index 72e0c8b..6216a05 100644
--- a/og_image_writer/Cargo.toml
+++ b/og_image_writer/Cargo.toml
@@ -15,7 +15,7 @@ description = "Generate an Open Graphic Image using a CSS-like API."
 imageproc = "0.22"
 ab_glyph = "0.2.12"
 thiserror = "1.0"
-wasm-bindgen = { version = "0.2" }
+wasm-bindgen = { version = "=0.2.78" }
 conv = "0.3.3"
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies.image]
diff --git a/wasm/Cargo.toml b/wasm/Cargo.toml
index 1c00ce1..2efdd27 100644
--- a/wasm/Cargo.toml
+++ b/wasm/Cargo.toml
@@ -16,7 +16,7 @@ crate-type = ["cdylib"]
 
 [dependencies]
 og_image_writer = { path = "../og_image_writer" }
-wasm-bindgen = { version = "0.2", features = ["serde-serialize"] }
+wasm-bindgen = { version = "=0.2.78", features = ["serde-serialize"] }
 console_error_panic_hook = { version = "0.1.7", optional = true }
 wee_alloc = { version = "0.4.5", optional = true }
 cfg-if = "1.0.0"