diff --git a/requirements.txt b/requirements.txt
index 09e90a1a..de46b624 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,8 +2,6 @@ numpy
 pandas
 scipy
 
-# NOTE: switch to non-dev versions when releasing! Last explicit versions were:
-# cirq==0.3.1.*
-# openfermion==0.8.1
-cirq~=0.4.0.dev
-openfermion~=0.8.2.dev
+# NOTE: switch to non-dev versions when releasing!
+cirq==0.4.0
+openfermion==0.9.0