diff --git a/requirements.txt b/requirements.txt
index 499fec88..f099d8d8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ pbkdf2==1.3
 pexpect==4.6.0
 pkg-resources==0.0.0
 pluggy==0.6.0
-protobuf==3.0.0a3
+protobuf==3.15.0
 psycopg2==2.7.4
 psycopg2-binary==2.7.4
 ptyprocess==0.6.0
diff --git a/wallet_manager/requirements.txt b/wallet_manager/requirements.txt
index 50aafaf2..81461b95 100644
--- a/wallet_manager/requirements.txt
+++ b/wallet_manager/requirements.txt
@@ -38,7 +38,7 @@ pbkdf2==1.3
 pexpect==4.6.0
 pkg-resources==0.0.0
 pluggy==0.6.0
-protobuf==3.0.0a3
+protobuf==3.15.0
 ptyprocess==0.6.0
 py==1.5.4
 py-solc==3.1.0