diff --git a/poetry.lock b/poetry.lock
index 9f178a0e..c3774a17 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1809,14 +1809,11 @@ wcwidth = "*"
 
 [[package]]
 name = "protobuf"
-version = "3.15.0"
-description = "Protocol Buffers"
+version = "4.21.6"
+description = ""
 category = "main"
 optional = false
-python-versions = "*"
-
-[package.dependencies]
-six = ">=1.9"
+python-versions = ">=3.7"
 
 [[package]]
 name = "psutil"
@@ -2734,7 +2731,7 @@ testing = ["func-timeout", "jaraco.itertools", "pytest (>=6)", "pytest-black (>=
 [metadata]
 lock-version = "1.1"
 python-versions = ">=3.8.0,<3.9.7 || >3.9.7,<3.11"
-content-hash = "368756abb9e5d32c36550a53c7ae02d94263d4153acd56cbb76071e0ff20b799"
+content-hash = "b762a51b7ecbb837e4555c5a60de4274e3a32be9b1c9de57cfde02467113e5b5"
 
 [metadata.files]
 aiobotocore = [
@@ -4079,26 +4076,20 @@ prompt-toolkit = [
     {file = "prompt_toolkit-3.0.31.tar.gz", hash = "sha256:9ada952c9d1787f52ff6d5f3484d0b4df8952787c087edf6a1f7c2cb1ea88148"},
 ]
 protobuf = [
-    {file = "protobuf-3.15.0-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:44d824adb48fe8baf81e628c2edaf9911912cd592a83621d2b877ccfde631d61"},
-    {file = "protobuf-3.15.0-cp27-cp27mu-manylinux1_x86_64.whl", hash = "sha256:b04449133e31b65924650d758efbc2397c2d0e5eb3c8cae7428ffc4fa9c3403d"},
-    {file = "protobuf-3.15.0-cp35-cp35m-macosx_10_9_intel.whl", hash = "sha256:ef69a10d45529a08367e70e736b3ce8e2af51360f23650ef1d4381ff9038467a"},
-    {file = "protobuf-3.15.0-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:50f28efa66232a2fbbdd638dd61d9399ff66bcfde40ff305263b229692928081"},
-    {file = "protobuf-3.15.0-cp35-cp35m-win32.whl", hash = "sha256:25f0ee57684f7bc3f0511b73cf55c016a891d09079c357794759663fe3da9cd3"},
-    {file = "protobuf-3.15.0-cp35-cp35m-win_amd64.whl", hash = "sha256:94b34486986d7683e83f9d02a0112533263fc20fae54fff3f4fd69451e682ec7"},
-    {file = "protobuf-3.15.0-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:11f192d491613f692b3ddc18f06c925785b3019c8e35d32c811421ca9ff7d50e"},
-    {file = "protobuf-3.15.0-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:867635c1d541ce336a1a4df3379d1116f02eba6dc326d080c8ef02f34036c415"},
-    {file = "protobuf-3.15.0-cp36-cp36m-win32.whl", hash = "sha256:f6d10b1f86cebb8008a256f474948fc6204391e02a9c12935eebf036bbb07b65"},
-    {file = "protobuf-3.15.0-cp36-cp36m-win_amd64.whl", hash = "sha256:5c2ee13f5ea237a17bd81f52f972b7d334c0a43330d2a2a7b25b07f16eb146d8"},
-    {file = "protobuf-3.15.0-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:2ccc0169b5145b3af676b6997be6fe62961edfc12bb524a7b9c46fb5d208a3d4"},
-    {file = "protobuf-3.15.0-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:51e080fb1de5db54b0a6b1519ba8dda55e57404b0a4948e58f1342a3e15d89ec"},
-    {file = "protobuf-3.15.0-cp37-cp37m-win32.whl", hash = "sha256:d892e487bd544463ce1e656434591593f710169335ac3f02ce30ee866c2f2464"},
-    {file = "protobuf-3.15.0-cp37-cp37m-win_amd64.whl", hash = "sha256:40f031f79b0254aa62082ca87776c0959d85adf99f09cdef9d0b320bb772a609"},
-    {file = "protobuf-3.15.0-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:ae4bcd5a0ce3f77d0523c3e5ed0d04ed2af454f7bf7cef08cb7a8d0915ac80a9"},
-    {file = "protobuf-3.15.0-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:830a9c71df347b3fb3cd24ec985c4ed64f6e75983f543a1d8a3c96302dae915c"},
-    {file = "protobuf-3.15.0-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:fecf1b00ccc87bb8debca8b56458cc57c486d2d7afe22c7526728f79ffe232f4"},
-    {file = "protobuf-3.15.0-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:0e00b4e4a4800b389ae7f0058e1fc9d012444fdde926569d8cce55c84a01ef74"},
-    {file = "protobuf-3.15.0-py2.py3-none-any.whl", hash = "sha256:013a9ec4dccad9a6ed3aa1ad9e86a25a4e0d6d3bbe059b6f6502db20473c3e69"},
-    {file = "protobuf-3.15.0.tar.gz", hash = "sha256:e9f13fadb15b80e4a83ef5d9fa44e19243b1e2d96e84ee2228ca305180ca059e"},
+    {file = "protobuf-4.21.6-cp310-abi3-win32.whl", hash = "sha256:49f88d56a9180dbb7f6199c920f5bb5c1dd0172f672983bb281298d57c2ac8eb"},
+    {file = "protobuf-4.21.6-cp310-abi3-win_amd64.whl", hash = "sha256:7a6cc8842257265bdfd6b74d088b829e44bcac3cca234c5fdd6052730017b9ea"},
+    {file = "protobuf-4.21.6-cp37-abi3-macosx_10_9_universal2.whl", hash = "sha256:ba596b9ffb85c909fcfe1b1a23136224ed678af3faf9912d3fa483d5f9813c4e"},
+    {file = "protobuf-4.21.6-cp37-abi3-manylinux2014_aarch64.whl", hash = "sha256:4143513c766db85b9d7c18dbf8339673c8a290131b2a0fe73855ab20770f72b0"},
+    {file = "protobuf-4.21.6-cp37-abi3-manylinux2014_x86_64.whl", hash = "sha256:b6cea204865595a92a7b240e4b65bcaaca3ad5d2ce25d9db3756eba06041138e"},
+    {file = "protobuf-4.21.6-cp37-cp37m-win32.whl", hash = "sha256:9666da97129138585b26afcb63ad4887f602e169cafe754a8258541c553b8b5d"},
+    {file = "protobuf-4.21.6-cp37-cp37m-win_amd64.whl", hash = "sha256:308173d3e5a3528787bb8c93abea81d5a950bdce62840d9760effc84127fb39c"},
+    {file = "protobuf-4.21.6-cp38-cp38-win32.whl", hash = "sha256:aa29113ec901281f29d9d27b01193407a98aa9658b8a777b0325e6d97149f5ce"},
+    {file = "protobuf-4.21.6-cp38-cp38-win_amd64.whl", hash = "sha256:8f9e60f7d44592c66e7b332b6a7b4b6e8d8b889393c79dbc3a91f815118f8eac"},
+    {file = "protobuf-4.21.6-cp39-cp39-win32.whl", hash = "sha256:80e6540381080715fddac12690ee42d087d0d17395f8d0078dfd6f1181e7be4c"},
+    {file = "protobuf-4.21.6-cp39-cp39-win_amd64.whl", hash = "sha256:77b355c8604fe285536155286b28b0c4cbc57cf81b08d8357bf34829ea982860"},
+    {file = "protobuf-4.21.6-py2.py3-none-any.whl", hash = "sha256:07a0bb9cc6114f16a39c866dc28b6e3d96fa4ffb9cc1033057412547e6e75cb9"},
+    {file = "protobuf-4.21.6-py3-none-any.whl", hash = "sha256:c7c864148a237f058c739ae7a05a2b403c0dfa4ce7d1f3e5213f352ad52d57c6"},
+    {file = "protobuf-4.21.6.tar.gz", hash = "sha256:6b1040a5661cd5f6e610cbca9cfaa2a17d60e2bb545309bc1b278bb05be44bdd"},
 ]
 psutil = [
     {file = "psutil-5.9.1-cp27-cp27m-manylinux2010_i686.whl", hash = "sha256:799759d809c31aab5fe4579e50addf84565e71c1dc9f1c31258f159ff70d3f87"},
@@ -4820,7 +4811,6 @@ traitlets = [
     {file = "traitlets-5.4.0.tar.gz", hash = "sha256:3f2c4e435e271592fe4390f1746ea56836e3a080f84e7833f0f801d9613fec39"},
 ]
 treelib = [
-    {file = "treelib-1.6.1-py3.7.egg", hash = "sha256:8065064e5b92f59400295c221226b65905fd219c6ea43971fa0676b9e7780095"},
     {file = "treelib-1.6.1.tar.gz", hash = "sha256:1cbfffb2d2b75ccac27d0200cee0507b6fbb0726e0afb9fae017ade5d2ce8788"},
 ]
 typeguard = [
diff --git a/pyproject.toml b/pyproject.toml
index 72936cdf..662824b0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ pyopls = "^20.3.post1"
 nltk = "^3.6.2"
 textblob = "^0.15.3"
 llvmlite = "0.38.0"
-protobuf = "3.15.0"
+protobuf = "4.21.6"
 
 [tool.poetry.dev-dependencies]
 black-nb = "^0.7"