diff --git a/requirements.txt b/requirements.txt
index 67f923c..37c4191 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -79,26 +79,21 @@ chardet==3.0.4 \
 certifi==2019.11.28 \
     --hash=sha256:017c25db2a153ce562900032d5bc68e9f191e44e9a0f762f373977de9df1fbb3 \
     --hash=sha256:25b64c7da4cd7479594d035c08c2d809eb4aab3a26e5a990ea98cc450c320f1f
-protobuf==3.11.3 \
-    --hash=sha256:0bae429443cc4748be2aadfdaf9633297cfaeb24a9a02d0ab15849175ce90fab \
-    --hash=sha256:24e3b6ad259544d717902777b33966a1a069208c885576254c112663e6a5bb0f \
-    --hash=sha256:2affcaba328c4662f3bc3c0e9576ea107906b2c2b6422344cdad961734ff6b93 \
-    --hash=sha256:310a7aca6e7f257510d0c750364774034272538d51796ca31d42c3925d12a52a \
-    --hash=sha256:52e586072612c1eec18e1174f8e3bb19d08f075fc2e3f91d3b16c919078469d0 \
-    --hash=sha256:73152776dc75f335c476d11d52ec6f0f6925774802cd48d6189f4d5d7fe753f4 \
-    --hash=sha256:7774bbbaac81d3ba86de646c39f154afc8156717972bf0450c9dbfa1dc8dbea2 \
-    --hash=sha256:82d7ac987715d8d1eb4068bf997f3053468e0ce0287e2729c30601feb6602fee \
-    --hash=sha256:8eb9c93798b904f141d9de36a0ba9f9b73cc382869e67c9e642c0aba53b0fc07 \
-    --hash=sha256:adf0e4d57b33881d0c63bb11e7f9038f98ee0c3e334c221f0858f826e8fb0151 \
-    --hash=sha256:c40973a0aee65422d8cb4e7d7cbded95dfeee0199caab54d5ab25b63bce8135a \
-    --hash=sha256:c77c974d1dadf246d789f6dad1c24426137c9091e930dbf50e0a29c1fcf00b1f \
-    --hash=sha256:dd9aa4401c36785ea1b6fff0552c674bdd1b641319cb07ed1fe2392388e9b0d7 \
-    --hash=sha256:e11df1ac6905e81b815ab6fd518e79be0a58b5dc427a2cf7208980f30694b956 \
-    --hash=sha256:e2f8a75261c26b2f5f3442b0525d50fd79a71aeca04b5ec270fc123536188306 \
-    --hash=sha256:e512b7f3a4dd780f59f1bf22c302740e27b10b5c97e858a6061772668cd6f961 \
-    --hash=sha256:ef2c2e56aaf9ee914d3dccc3408d42661aaf7d9bb78eaa8f17b2e6282f214481 \
-    --hash=sha256:fac513a9dc2a74b99abd2e17109b53945e364649ca03d9f7a0b96aa8d1807d0a \
-    --hash=sha256:fdfb6ad138dbbf92b5dbea3576d7c8ba7463173f7d2cb0ca1bd336ec88ddbd80
+protobuf==4.21.1 \
+    --hash=sha256:0d4719e724472e296062ba8e82a36d64693fcfdb550d9dff98af70ca79eafe3d \
+    --hash=sha256:2b35602cb65d53c168c104469e714bf68670335044c38eee3c899d6a8af03ffc \
+    --hash=sha256:32fff501b6df3050936d1839b80ea5899bf34db24792d223d7640611f67de15a \
+    --hash=sha256:34400fd76f85bdae9a2e9c1444ea4699c0280962423eff4418765deceebd81b5 \
+    --hash=sha256:3767c64593a49c7ac0accd08ed39ce42744405f0989d468f0097a17496fdbe84 \
+    --hash=sha256:3f2ed842e8ca43b790cb4a101bcf577226e0ded98a6a6ba2d5e12095a08dc4da \
+    --hash=sha256:52c1e44e25f2949be7ffa7c66acbfea940b0945dd416920231f7cb30ea5ac6db \
+    --hash=sha256:5d9b5c8270461706973c3871c6fbdd236b51dfe9dab652f1fb6a36aa88287e47 \
+    --hash=sha256:72d357cc4d834cc85bd957e8b8e1f4b64c2eac9ca1a942efeb8eb2e723fca852 \
+    --hash=sha256:79cd8d0a269b714f6b32641f86928c718e8d234466919b3f552bfb069dbb159b \
+    --hash=sha256:a4c0c6f2f95a559e59a0258d3e4b186f340cbdc5adec5ce1bc06d01972527c88 \
+    --hash=sha256:b309fda192850ac4184ca1777aab9655564bc8d10a9cc98f10e1c8bf11295c22 \
+    --hash=sha256:b3d7d4b4945fe3c001403b6c24442901a5e58c0a3059290f5a63523ed4435f82 \
+    --hash=sha256:c8829092c5aeb61619161269b2f8a2e36fd7cb26abbd9282d3bc453f02769146
 Jinja2==2.11.3 \
     --hash=sha256:03e47ad063331dd6a3f04a43eddca8a966a26ba0c5b7207a9a9e4e08f1b29419 \
     --hash=sha256:a6d58433de0ae800347cab1fa3043cebbabe8baa9d29e668f1c768cb87a333c6