diff --git a/packages/viz/CHANGELOG.md b/packages/viz/CHANGELOG.md
index 3edbc9d3..a20a6477 100644
--- a/packages/viz/CHANGELOG.md
+++ b/packages/viz/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+* Update Expat to 2.6.2.
+
 ## 3.5.0
 
 * Update Graphviz to 11.0.0.
diff --git a/packages/viz/src/module/Dockerfile b/packages/viz/src/module/Dockerfile
index 88451596..4f9f2964 100644
--- a/packages/viz/src/module/Dockerfile
+++ b/packages/viz/src/module/Dockerfile
@@ -2,7 +2,7 @@ FROM emscripten/emsdk:3.1.51 AS graphviz
 
 ENV PREFIX=/prefix
 
-ADD "https://github.com/libexpat/libexpat/releases/download/R_2_5_0/expat-2.5.0.tar.gz" ./expat.tar.gz
+ADD "https://github.com/libexpat/libexpat/releases/download/R_2_6_2/expat-2.6.2.tar.gz" ./expat.tar.gz
 
 RUN mkdir -p expat && tar -zxf ./expat.tar.gz --strip-components 1 --directory expat
 RUN cd expat && emconfigure ./configure --host=wasm32 --disable-shared --prefix="${PREFIX}" --libdir="${PREFIX}/lib" CFLAGS="-Oz" CXXFLAGS="-Oz"