diff --git a/requirements.txt b/requirements.txt
index c3639f4..194241a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ parso==0.2.1
 pexpect==4.6.0
 pickleshare==0.7.4
 prompt-toolkit==1.0.15
-protobuf==3.5.2.post1
+protobuf==3.18.3
 ptyprocess==0.5.2
 pyfasttext==0.4.5
 Pygments==2.2.0
diff --git a/requirements_tf_gpu.txt b/requirements_tf_gpu.txt
index 742afcb..3398044 100644
--- a/requirements_tf_gpu.txt
+++ b/requirements_tf_gpu.txt
@@ -38,7 +38,7 @@ parso==0.2.1
 pexpect==4.6.0
 pickleshare==0.7.4
 prompt-toolkit==1.0.15
-protobuf==3.5.2.post1
+protobuf==3.18.3
 ptyprocess==0.5.2
 pyfasttext==0.4.5
 Pygments==2.2.0