diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c7fdb47..f68d16c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,7 +10,7 @@ on:
 jobs:
   build:
     name: build-${{ matrix.arch }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
       matrix:
diff --git a/build.sh b/build.sh
index bb23149..0611b63 100755
--- a/build.sh
+++ b/build.sh
@@ -2,7 +2,7 @@
 
 set -eu
 
-MIMALLOC_VERSION=2.1.6
+MIMALLOC_VERSION=2.1.7
 
 cd /tmp