diff --git a/build/setup-emsdk.sh b/build/setup-emsdk.sh
index b1ff57b..66c98fe 100755
--- a/build/setup-emsdk.sh
+++ b/build/setup-emsdk.sh
@@ -2,5 +2,6 @@ mkdir -p /opt/dev \
 && cd /opt/dev \
 && git clone https://github.com/emscripten-core/emsdk.git \
 && cd /opt/dev/emsdk \
+&& git reset --hard 0fde04880048f743056bed17cb0543a42e040fae \
 && ./emsdk install 3.1.45 \
 && ./emsdk activate 3.1.45