diff --git a/word2vec_skipgram/requirements.txt b/word2vec_skipgram/requirements.txt
index 51c24c7e..40beb616 100644
--- a/word2vec_skipgram/requirements.txt
+++ b/word2vec_skipgram/requirements.txt
@@ -27,7 +27,7 @@ pandocfilters==1.4.1
 pexpect==4.2.1
 pickleshare==0.7.4
 prompt-toolkit==1.0.14
-protobuf==3.2.0
+protobuf==3.15.0
 ptyprocess==0.5.1
 Pygments==2.2.0
 pyparsing==2.2.0