diff --git a/CHANGELOG.md b/CHANGELOG.md
index c0bca941..83646de0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,8 @@ announcements on the StageXL forum or use one of the support links below:
   * StageXL GitHub <https://github.com/bp74/StageXL/issues>
   * StageXL StackOverflow: <https://stackoverflow.com/questions/ask?tags=stagexl>
 
-### 2.3.1-wip
+### 2.3.1
+* Fixed JavaScript type casting problems that affected WebAssembly.
 * Fixed links in `pubspec.yaml`.
 
 ### 2.3.0
diff --git a/lib/src/engine/render_program.dart b/lib/src/engine/render_program.dart
index aa1be8f1..2b5407b0 100644
--- a/lib/src/engine/render_program.dart
+++ b/lib/src/engine/render_program.dart
@@ -92,9 +92,11 @@ abstract class RenderProgram {
     rc.attachShader(program, fShader);
     rc.linkProgram(program);
 
-    final status =
-        rc.getProgramParameter(program, web.WebGLRenderingContext.LINK_STATUS);
-    if (identical(status, true)) return program;
+    if ((rc.getProgramParameter(program, web.WebGLRenderingContext.LINK_STATUS)
+            as JSBoolean)
+        .toDart) {
+      return program;
+    }
 
     final cl = rc.isContextLost();
     throw StateError(cl ? 'ContextLost' : rc.getProgramInfoLog(program)!);
@@ -106,14 +108,16 @@ abstract class RenderProgram {
       web.WebGLRenderingContext rc, String source, int type) {
     final shader = rc.createShader(type);
     if (shader == null) {
-      throw StateError('Failed to create shader');
+      throw StateError('Failed to create shader (type $type)');
     }
     rc.shaderSource(shader, source);
     rc.compileShader(shader);
 
-    final status =
-        rc.getShaderParameter(shader, web.WebGLRenderingContext.COMPILE_STATUS);
-    if (identical(status, true)) return shader;
+    if ((rc.getShaderParameter(shader, web.WebGLRenderingContext.COMPILE_STATUS)
+            as JSBoolean)
+        .toDart) {
+      return shader;
+    }
 
     final cl = rc.isContextLost();
     throw StateError(cl ? 'ContextLost' : rc.getShaderInfoLog(shader)!);
@@ -124,8 +128,9 @@ abstract class RenderProgram {
   void _updateAttributes(
       web.WebGLRenderingContext rc, web.WebGLProgram program) {
     _attributes.clear();
-    final count = rc.getProgramParameter(
-        program, web.WebGLRenderingContext.ACTIVE_ATTRIBUTES) as int;
+    final count = (rc.getProgramParameter(
+            program, web.WebGLRenderingContext.ACTIVE_ATTRIBUTES) as JSNumber)
+        .toDartInt;
 
     for (var i = 0; i < count; i++) {
       final activeInfo = rc.getActiveAttrib(program, i);
@@ -142,8 +147,9 @@ abstract class RenderProgram {
 
   void _updateUniforms(web.WebGLRenderingContext rc, web.WebGLProgram program) {
     _uniforms.clear();
-    final count = rc.getProgramParameter(
-        program, web.WebGLRenderingContext.ACTIVE_UNIFORMS) as int;
+    final count = (rc.getProgramParameter(
+            program, web.WebGLRenderingContext.ACTIVE_UNIFORMS) as JSNumber)
+        .toDartInt;
 
     for (var i = 0; i < count; i++) {
       final activeInfo = rc.getActiveUniform(program, i);
diff --git a/pubspec.yaml b/pubspec.yaml
index 03a8f4a3..449c59be 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: stagexl
-version: 2.3.1-wip
+version: 2.3.1
 description: A fast and universal 2D rendering engine for HTML5 and Dart.
 homepage: http://www.stagexl.org
 repository: https://github.com/bp74/StageXL