diff --git a/web-wasm/Dockerfile.in b/web-wasm/Dockerfile.in
index 2754a2c..c34a3e4 100644
--- a/web-wasm/Dockerfile.in
+++ b/web-wasm/Dockerfile.in
@@ -1,4 +1,4 @@
-ARG DOCKER_IMAGE_VERSION=3.1.46
+ARG DOCKER_IMAGE_VERSION=3.1.56
 FROM emscripten/emsdk:$DOCKER_IMAGE_VERSION
 
 LABEL maintainer="Matt McCormick matt.mccormick@kitware.com"