diff --git a/Dockerfile.emscripten b/Dockerfile.emscripten
index bdb18d545f4bd00c800ece9d1f1128825e4b74c1..5bddf3ded813e0a877cb9af9eab4506390b0ea29 100644
--- a/Dockerfile.emscripten
+++ b/Dockerfile.emscripten
@@ -13,7 +13,8 @@ RUN apt-get update && \
     jq \
     autoconf \
     libtool \
-    protobuf-compiler
+    protobuf-compiler && \
+  npm install -g yarn
 
 FROM supplemented_tools_sdk AS lib_source