diff --git a/requirements.txt b/requirements.txt
index 4b2294b..80bacea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ nltk==3.4
 numpy==1.15.4
 parse==1.9.0
 progressbar==2.5
-protobuf==3.7.1
+protobuf==3.15.0
 psutil==5.4.8
 pyparsing==2.3.0
 python-dateutil==2.7.5
diff --git a/requirements3.txt b/requirements3.txt
index c250770..80cc439 100644
--- a/requirements3.txt
+++ b/requirements3.txt
@@ -94,7 +94,7 @@ praw==5.3.0
 prawcore==0.13.0
 preshed==2.0.1
 progressbar==2.5
-protobuf==3.7.1
+protobuf==3.15.0
 psutil==5.5.1
 py==1.7.0
 pyaml==18.11.0