diff --git a/web-wasm/Dockerfile.in b/web-wasm/Dockerfile.in
index 6b8ddb8..5808a56 100644
--- a/web-wasm/Dockerfile.in
+++ b/web-wasm/Dockerfile.in
@@ -1,4 +1,4 @@
-FROM emscripten/emsdk:3.1.1
+FROM emscripten/emsdk:3.1.5
 
 LABEL maintainer="Matt McCormick matt.mccormick@kitware.com"
 
@@ -56,7 +56,7 @@ RUN ln -s /usr/bin/python3 /usr/bin/python
 
 #include "common.webassembly"
 
-ENV EMSCRIPTEN_VERSION 3.1.1
+ENV EMSCRIPTEN_VERSION 3.1.5
 
 ENV PATH /emsdk:/emsdk/upstream/bin/:/emsdk/upstream/emscripten:${PATH}
 ENV CC=/emsdk/upstream/emscripten/emcc \