diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 92309448..8ea2b055 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -79,9 +79,14 @@ jobs:
           python -m pip install --upgrade pip
           python -m pip install maturin pytest numpy hypothesis
 
-      - name: Build extension in release mode
+      - name: Build wheel
         working-directory: bindings/python
-        run: maturin develop --release
+        run: maturin build --release --out dist
+
+      - name: Install wheel
+        shell: bash
+        working-directory: bindings/python
+        run: python -m pip install --find-links dist --force-reinstall wickra
 
       - name: Run Python tests
         working-directory: bindings/python
@@ -168,9 +173,13 @@ jobs:
           python -m pip install --upgrade pip
           python -m pip install maturin numpy pandas talipp finta
 
-      - name: Build Wickra extension
+      - name: Build Wickra wheel
         working-directory: bindings/python
-        run: maturin develop --release
+        run: maturin build --release --out dist
+
+      - name: Install Wickra wheel
+        working-directory: bindings/python
+        run: python -m pip install --find-links dist --force-reinstall wickra
 
       - name: Run cross-library benchmark
         working-directory: bindings/python
diff --git a/bindings/wasm/Cargo.toml b/bindings/wasm/Cargo.toml
index fc39c75e..d7c4d6ce 100644
--- a/bindings/wasm/Cargo.toml
+++ b/bindings/wasm/Cargo.toml
@@ -35,4 +35,16 @@ default = []
 panic-hook = ["dep:console_error_panic_hook"]
 
 [package.metadata.wasm-pack.profile.release]
-wasm-opt = ['-O3', '--enable-bulk-memory']
+# The wasm-opt that ships with wasm-pack is older than the WebAssembly
+# features rustc enables by default (reference-types, multivalue,
+# bulk-memory, sign-extension, mutable-globals, …). Listing them all keeps
+# wasm-opt happy without requiring a binaryen upgrade in CI.
+wasm-opt = [
+    '-O3',
+    '--enable-bulk-memory',
+    '--enable-mutable-globals',
+    '--enable-nontrapping-float-to-int',
+    '--enable-sign-ext',
+    '--enable-reference-types',
+    '--enable-multivalue',
+]