diff --git a/requirements.txt b/requirements.txt
index 7427cd6..00b9f50 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -81,25 +81,27 @@ packaging==20.4 \
 pluggy==0.13.1 \
     --hash=sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d \
     --hash=sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0
-protobuf==3.12.2 \
-    --hash=sha256:e1464a4a2cf12f58f662c8e6421772c07947266293fb701cb39cd9c1e183f63c \
-    --hash=sha256:6f349adabf1c004aba53f7b4633459f8ca8a09654bf7e69b509c95a454755776 \
-    --hash=sha256:be04fe14ceed7f8641e30f36077c1a654ff6f17d0c7a5283b699d057d150d82a \
-    --hash=sha256:f4b73736108a416c76c17a8a09bc73af3d91edaa26c682aaa460ef91a47168d3 \
-    --hash=sha256:5524c7020eb1fb7319472cb75c4c3206ef18b34d6034d2ee420a60f99cddeb07 \
-    --hash=sha256:bff02030bab8b969f4de597543e55bd05e968567acb25c0a87495a31eb09e925 \
-    --hash=sha256:c9ca9f76805e5a637605f171f6c4772fc4a81eced4e2f708f79c75166a2c99ea \
-    --hash=sha256:304e08440c4a41a0f3592d2a38934aad6919d692bb0edfb355548786728f9a5e \
-    --hash=sha256:b5a114ea9b7fc90c2cc4867a866512672a47f66b154c6d7ee7e48ddb68b68122 \
-    --hash=sha256:85b94d2653b0fdf6d879e39d51018bf5ccd86c81c04e18a98e9888694b98226f \
-    --hash=sha256:a7ab28a8f1f043c58d157bceb64f80e4d2f7f1b934bc7ff5e7f7a55a337ea8b0 \
-    --hash=sha256:eafe9fa19fcefef424ee089fb01ac7177ff3691af7cc2ae8791ae523eb6ca907 \
-    --hash=sha256:612bc97e42b22af10ba25e4140963fbaa4c5181487d163f4eb55b0b15b3dfcd2 \
-    --hash=sha256:e72736dd822748b0721f41f9aaaf6a5b6d5cfc78f6c8690263aef8bba4457f0e \
-    --hash=sha256:87535dc2d2ef007b9d44e309d2b8ea27a03d2fa09556a72364d706fcb7090828 \
-    --hash=sha256:50b5fee674878b14baea73b4568dc478c46a31dd50157a5b5d2f71138243b1a9 \
-    --hash=sha256:a96f8fc625e9ff568838e556f6f6ae8eca8b4837cdfb3f90efcb7c00e342a2eb \
-    --hash=sha256:49ef8ab4c27812a89a76fa894fe7a08f42f2147078392c0dee51d4a444ef6df5
+protobuf==3.15.0 \
+    --hash=sha256:013a9ec4dccad9a6ed3aa1ad9e86a25a4e0d6d3bbe059b6f6502db20473c3e69 \
+    --hash=sha256:0e00b4e4a4800b389ae7f0058e1fc9d012444fdde926569d8cce55c84a01ef74 \
+    --hash=sha256:11f192d491613f692b3ddc18f06c925785b3019c8e35d32c811421ca9ff7d50e \
+    --hash=sha256:25f0ee57684f7bc3f0511b73cf55c016a891d09079c357794759663fe3da9cd3 \
+    --hash=sha256:2ccc0169b5145b3af676b6997be6fe62961edfc12bb524a7b9c46fb5d208a3d4 \
+    --hash=sha256:40f031f79b0254aa62082ca87776c0959d85adf99f09cdef9d0b320bb772a609 \
+    --hash=sha256:44d824adb48fe8baf81e628c2edaf9911912cd592a83621d2b877ccfde631d61 \
+    --hash=sha256:50f28efa66232a2fbbdd638dd61d9399ff66bcfde40ff305263b229692928081 \
+    --hash=sha256:51e080fb1de5db54b0a6b1519ba8dda55e57404b0a4948e58f1342a3e15d89ec \
+    --hash=sha256:5c2ee13f5ea237a17bd81f52f972b7d334c0a43330d2a2a7b25b07f16eb146d8 \
+    --hash=sha256:830a9c71df347b3fb3cd24ec985c4ed64f6e75983f543a1d8a3c96302dae915c \
+    --hash=sha256:867635c1d541ce336a1a4df3379d1116f02eba6dc326d080c8ef02f34036c415 \
+    --hash=sha256:94b34486986d7683e83f9d02a0112533263fc20fae54fff3f4fd69451e682ec7 \
+    --hash=sha256:ae4bcd5a0ce3f77d0523c3e5ed0d04ed2af454f7bf7cef08cb7a8d0915ac80a9 \
+    --hash=sha256:b04449133e31b65924650d758efbc2397c2d0e5eb3c8cae7428ffc4fa9c3403d \
+    --hash=sha256:d892e487bd544463ce1e656434591593f710169335ac3f02ce30ee866c2f2464 \
+    --hash=sha256:e9f13fadb15b80e4a83ef5d9fa44e19243b1e2d96e84ee2228ca305180ca059e \
+    --hash=sha256:ef69a10d45529a08367e70e736b3ce8e2af51360f23650ef1d4381ff9038467a \
+    --hash=sha256:f6d10b1f86cebb8008a256f474948fc6204391e02a9c12935eebf036bbb07b65 \
+    --hash=sha256:fecf1b00ccc87bb8debca8b56458cc57c486d2d7afe22c7526728f79ffe232f4
 py==1.9.0 \
     --hash=sha256:366389d1db726cd2fcfc79732e75410e5fe4d31db13692115529d34069a043c2 \
     --hash=sha256:9ca6883ce56b4e8da7e79ac18787889fa5206c79dcc67fb065376cd2fe03f342