diff --git a/Dockerfile b/Dockerfile
index 149e35b..ed2c3ba 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM emscripten/emsdk:3.1.15 as build
+FROM emscripten/emsdk:5.0.1 as build
 
 ARG FFMPEG_VERSION=8.0.1
 ARG X264_COMMIT=b35605a
@@ -25,7 +25,7 @@ RUN git checkout ${X264_COMMIT} && \
   --disable-asm \
   --extra-cflags="-s USE_PTHREADS=1"
 
-RUN "emmake make && emmake make install"
+RUN emmake make && emmake make install
 
 WORKDIR /tmp/
 # libmp3lame