diff --git a/requirements.txt b/requirements.txt
index 31540abe..deb970e4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
-cirq-core>=0.12.0
-cirq-google>=0.12.0
+cirq-core>=0.12.0,<=0.14.0
+cirq-google>=0.12.0,<=0.14.0
 deprecation
 h5py>=2.8
 networkx