diff --git a/requirement.txt b/requirement.txt
index e9aa22b..8522931 100644
--- a/requirement.txt
+++ b/requirement.txt
@@ -15,7 +15,7 @@ google-auth-httplib2==0.0.3
 httplib2==0.12.1
 idna==2.8
 Naked==0.1.31
-protobuf==3.7.0
+protobuf==3.15.0
 pyasn1==0.4.5
 pyasn1-modules==0.2.4
 pycryptodome==3.7.3
diff --git a/setup.py b/setup.py
index 39b6b0b..7123628 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@
         "eth-utils == 1.0.3",
         "idna == 2.6",
         "Naked == 0.1.31",
-        "protobuf == 3.5.2.post1",
+        "protobuf == 3.15.0",
         "pycryptodome == 3.6.6",
         "pycurl == 7.43.0.1",
         "pyscrypt == 1.6.2",