diff --git a/script/fetch-emscripten b/script/fetch-emscripten
index 3e219286..bbd15a39 100755
--- a/script/fetch-emscripten
+++ b/script/fetch-emscripten
@@ -2,7 +2,7 @@
 
 set -e
 
-EMSCRIPTEN_VERSION=1.38.40
+EMSCRIPTEN_VERSION=1.39.0
 
 mkdir -p target
 EMSDK_DIR="./target/emsdk"