diff --git a/requirements.txt b/requirements.txt
index 67f923c..5184b56 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==4.21.4 \
+    --hash=sha256:0275902f8292039d4a022319d3f86e8b231ac4c51d7be4cb797890fb78c16b85 \
+    --hash=sha256:142ef5d73d6cd1bd8ab539d7d73c3722f31d33e64914e01bb91439cfcef11a9f \
+    --hash=sha256:2ea8c841cc6422aea07d0f4f71f0e5e6e130de9a4b6c31a53b9d2a41a75f2d54 \
+    --hash=sha256:47b7cf3e542fd50a3a7c24d0da13451bc362a32c0a9b905714942ea8cf35fa11 \
+    --hash=sha256:5783dc0d6edae631145337fabb18503b4f77274f94cdd22a4b26b9fe5029e718 \
+    --hash=sha256:5b95c5f515334dd3a811762e3c588b469bf39d4ee7b7f47ac1e0c41dc73809f7 \
+    --hash=sha256:5e47947fbfefd5a1bdc7c28eea1d197ea6dba5812789c2429667831a55ef71b7 \
+    --hash=sha256:7e51f6244e53e936abadf624ab3a0f06dc106b27473997374fbb34e6b2eb1e60 \
+    --hash=sha256:a8119c029c60cf29b7eea5a9f56648482388e874611243f41cd10aff0a0e5461 \
+    --hash=sha256:adeccfbffbf4c9d1e77da86dc995d76c837d01387e412066cc803ad037000892 \
+    --hash=sha256:cb50d93ef748671b7e2537658869e00aaa8175d717d8e73a23fcd58842883229 \
+    --hash=sha256:d9b0398ff68017015ec2a37fb0ab390363a654362b15ca2e4543d3c82587768f \
+    --hash=sha256:e113f3d1629cebc911b107ce704f1a17d7e1589efef5c498e202bd47df223955 \
+    --hash=sha256:fd62b6eda64e199b5da651d6be42af2aa8e30805961af1fc5f70292affca78e3
 Jinja2==2.11.3 \
     --hash=sha256:03e47ad063331dd6a3f04a43eddca8a966a26ba0c5b7207a9a9e4e08f1b29419 \
     --hash=sha256:a6d58433de0ae800347cab1fa3043cebbabe8baa9d29e668f1c768cb87a333c6