diff --git a/packages/viz/CHANGELOG.md b/packages/viz/CHANGELOG.md
index f162f3a..be6d130 100644
--- a/packages/viz/CHANGELOG.md
+++ b/packages/viz/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## Unreleased
 
+* Update Emscripten SDK to 3.1.70.
 * Update Graphviz to 12.2.0.
 
 ## 3.10.0
diff --git a/packages/viz/src/module/Dockerfile b/packages/viz/src/module/Dockerfile
index 8ae4b03..6c526e7 100644
--- a/packages/viz/src/module/Dockerfile
+++ b/packages/viz/src/module/Dockerfile
@@ -1,4 +1,4 @@
-FROM emscripten/emsdk:3.1.64 AS graphviz
+FROM emscripten/emsdk:3.1.70 AS graphviz
 
 ENV PREFIX=/prefix
 
@@ -16,7 +16,7 @@ RUN cd graphviz/lib && emmake make install
 RUN cd graphviz/plugin && emmake make install
 
 
-FROM emscripten/emsdk:3.1.64 AS viz
+FROM emscripten/emsdk:3.1.70 AS viz
 
 ARG DEBUG=""