diff --git a/requirements.in b/requirements.in
index a4383c3c4..1fc1a2c9a 100644
--- a/requirements.in
+++ b/requirements.in
@@ -35,3 +35,4 @@ pylint==3.3.3
 nbformat==5.1.3
 nbclient==0.6.5
 tensorflow-docs
+clang-format~=18.1.0
diff --git a/requirements.txt b/requirements.txt
index 79e34a3da..210c06f29 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,6 +34,8 @@ cirq-core==1.5.0
     #   cirq-google
 cirq-google==1.5.0
     # via -r requirements.in
+clang-format==18.1.8
+    # via -r requirements.in
 contourpy==1.3.2
     # via
     #   -r requirements.in