diff --git a/packages/binutils/build/Dockerfile b/packages/binutils/build/Dockerfile
index fa5470c..a3f2328 100644
--- a/packages/binutils/build/Dockerfile
+++ b/packages/binutils/build/Dockerfile
@@ -1,4 +1,4 @@
-FROM emscripten/emsdk:4.0.12 AS builder
+FROM emscripten/emsdk:4.0.13 AS builder
 
 RUN apt-get update && \
     apt-get install -y git bison flex texinfo --no-install-recommends && \
diff --git a/packages/gas/build/Dockerfile b/packages/gas/build/Dockerfile
index dd6d4ae..9a82075 100644
--- a/packages/gas/build/Dockerfile
+++ b/packages/gas/build/Dockerfile
@@ -1,4 +1,4 @@
-FROM emscripten/emsdk:4.0.12 AS builder
+FROM emscripten/emsdk:4.0.13 AS builder
 
 RUN apt-get update && \
     apt-get install -y git bison flex texinfo parallel --no-install-recommends && \