diff --git a/Dockerfile b/Dockerfile
index 94382f3..4476154 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM emscripten/emsdk:2.0.11 as build
+FROM emscripten/emsdk:3.1.15 as build
 
 ARG FFMPEG_VERSION=4.3.1
 ARG X264_VERSION=20170226-2245-stable