diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 368ec991..d4e9706d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -138,7 +138,7 @@ jobs:
           cp ios-cmake/ios.toolchain.cmake .
           mkdir build
           cd build
-          cmake -G Xcode -DCMAKE_TOOLCHAIN_FILE=../ios.toolchain.cmake -DPLATFORM=OS64 .. -DPK_BUILD_STATIC_LIB=ON -DPK_USE_CJSON=ON -DPK_USE_BOX2D=ON
+          cmake -G Xcode -DCMAKE_TOOLCHAIN_FILE=../ios.toolchain.cmake -DPLATFORM=OS64 .. -DPK_BUILD_STATIC_LIB=ON -DPK_USE_CJSON=ON -DPK_USE_BOX2D=ON -DCMAKE_BUILD_TYPE=Release
           cmake --build . --config Release
           cd ..
           mkdir -p output/ios
diff --git a/build_android.sh b/build_android.sh
index 8197770d..7c407b97 100644
--- a/build_android.sh
+++ b/build_android.sh
@@ -11,6 +11,7 @@ cmake \
     -DANDROID_ABI=$1 \
     -DANDROID_PLATFORM=android-22 \
     ../../.. \
-    -DPK_BUILD_SHARED_LIB=ON -DPK_USE_CJSON=ON -DPK_USE_BOX2D=ON
+    -DPK_BUILD_SHARED_LIB=ON -DPK_USE_CJSON=ON -DPK_USE_BOX2D=ON \
+    -DCMAKE_BUILD_TYPE=Release
 
 cmake --build . --config Release
diff --git a/cmake_build.py b/cmake_build.py
index 16f9d727..edece8ea 100644
--- a/cmake_build.py
+++ b/cmake_build.py
@@ -7,7 +7,7 @@ if not os.path.exists("build"):
 
 os.chdir("build")
 
-code = os.system("cmake .. -DPK_USE_CJSON=ON -DPK_USE_BOX2D=ON")
+code = os.system("cmake .. -DPK_USE_CJSON=ON -DPK_USE_BOX2D=ON -DCMAKE_BUILD_TYPE=Release")
 assert code == 0
 code = os.system("cmake --build . --config Release")
 assert code == 0