diff --git a/tools/base/requirements.in b/tools/base/requirements.in
index b6671515eadb4..a9d97e0db8ac9 100644
--- a/tools/base/requirements.in
+++ b/tools/base/requirements.in
@@ -7,7 +7,7 @@ aiohttp>=3.11.6
 aioquic>=0.9.21
 cffi>=1.15.0
 clang-format==18.1.8
-clang-tidy==18.1.8
+clang-tidy==21.1.0
 colorama
 coloredlogs
 # NB: When updating this dep you _must_ strip out all the unused wheel hashes
diff --git a/tools/base/requirements.txt b/tools/base/requirements.txt
index 17f74c31cf82b..cb3921080d154 100644
--- a/tools/base/requirements.txt
+++ b/tools/base/requirements.txt
@@ -424,16 +424,17 @@ clang-format==18.1.8 \
     --hash=sha256:d3a41b7c7c3e65fa56763f5712f919111b35d7a8e857f8bef4ad5a4cdc1be131 \
     --hash=sha256:ea103b3ae5b0941152cd29c67eab086aafc98675370ac13581005807680132aa
     # via -r requirements.in
-clang-tidy==18.1.8 \
-    --hash=sha256:1f832286035f9df3be3b41ba29493ca9e67bf61a8636177da756d89b6313bbca \
-    --hash=sha256:226618642af66a734c0cca079dcf86ca94b2e6fc9ba1d7332f6b9e4426379198 \
-    --hash=sha256:341f3bebe13ef31d6d3fb9a9fde52795557d7d67d7449e8ed98a36dfe29b7421 \
-    --hash=sha256:9970d6c9c7e8c044582576f3be46bba3287d7280719b77c83e3977477de08ec4 \
-    --hash=sha256:9ff353dfa56d2b1afa09df7feedbee95d381339656cee8d8d61b326630d1ff2b \
-    --hash=sha256:a5f5e44649d2412bfe1563e6e7a4135102fbf2d98dbf30ce513b00a0a977c047 \
-    --hash=sha256:c725a95c316d15df12f5bf7c1abfdf3cb9e4f3b9a9afb4cb6bb1e9df4e669493 \
-    --hash=sha256:cebd2aa934e07e95c6821f27daa26dcbffcd946bd224f1d2a105af4bc857c143 \
-    --hash=sha256:d635df55e45c9141b16f4d33ef785d3ec6944db66a43ece865981447460affc3
+clang-tidy==21.1.0 \
+    --hash=sha256:04ffb7f47ac112c4d70be3bad8025de9e516b0e3b6cdbd34ff31542ca4abacad \
+    --hash=sha256:05d01c376b5dcf2d7d13ab1c6a6baab99c3de742b4bef0bfa18c724ada2ff797 \
+    --hash=sha256:4bfa8b9a6806fe216ea53927f1fbfde785a0f787b1c592ab8bddcb57f38d30be \
+    --hash=sha256:4c7768c357db8e75adab3db51f0b8ec2c4a4be431af6b2246f91952773dbcbf3 \
+    --hash=sha256:622eacdbcc9794abf4bb941afb72d5f16fb5ea784daf7ef0115278e287c29012 \
+    --hash=sha256:8c66f6c2a5be0fff1a7b6a73d6a1dfa72b849f8e1181a50a73ff98097b434858 \
+    --hash=sha256:aa83b1cdf8f40b1ae72f2f8e918205d428d04b22c1895b5f5ceaee1a3d5f3de8 \
+    --hash=sha256:c35f4f238a54e5cd7536ee25d22da0311a2eaac57a1ac3dc65e2884b3083b4c6 \
+    --hash=sha256:c368c2070f77cd57cb9248e17746cf778696d3664386d8b76be47a0019716f8d \
+    --hash=sha256:c5ea86c86d1f87435739624134e1b70ab3181b070277c4a0f682790928de166c
     # via -r requirements.in
 colorama==0.4.6 \
     --hash=sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44 \