diff --git a/tools/buildenv/CHANGES.txt b/tools/buildenv/CHANGES.txt
index 1c3c269..db9ef28 100644
--- a/tools/buildenv/CHANGES.txt
+++ b/tools/buildenv/CHANGES.txt
@@ -1,3 +1,6 @@
+v3.4.0
+ * Update to Bazel 7.2.1
+
 v3.3.0
  * Update to Bazel 6.5.0
 
diff --git a/tools/buildenv/Makefile b/tools/buildenv/Makefile
index 8ccadde..8670e77 100644
--- a/tools/buildenv/Makefile
+++ b/tools/buildenv/Makefile
@@ -4,7 +4,7 @@ VERSION=`cat VERSION.txt`
 
 build:
 	docker build \
-	  --build-arg bazel_version=6.5.0 \
+	  --build-arg bazel_version=7.2.1 \
 	  -t ghcr.io/krpc/buildenv:$(VERSION) .
 
 test:
diff --git a/tools/buildenv/VERSION.txt b/tools/buildenv/VERSION.txt
index 15a2799..1809198 100644
--- a/tools/buildenv/VERSION.txt
+++ b/tools/buildenv/VERSION.txt
@@ -1 +1 @@
-3.3.0
+3.4.0