diff --git a/tools/base/requirements.in b/tools/base/requirements.in
index b6671515eadb4..3c5c0a1b609c8 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==21.1.1
 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..3295d687ce6aa 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==21.1.1 \
+    --hash=sha256:144c21ab1c5343e3636e48c8ecf588111563eab04efd0f99077e3e4c239502b2 \
+    --hash=sha256:3edaa98d95c20b71013e761426ed471b817aa8a0d373d1c9578a596ac85fbe1e \
+    --hash=sha256:5aa4f726e32eb63010820493628da808394cdff5956828a5889e3b7a71a78c20 \
+    --hash=sha256:5edb71714a64b1f2bc51d62bfb3ad39fae7e9c7362ac149f9d7226aaec74d77b \
+    --hash=sha256:66c71b7751f721bb1b3da253360894b7677988b3d413acdbe1ac02b82aedc0ca \
+    --hash=sha256:817e2a3e73bcb71e4b990df16ae004268d11b4905288f73f2c8ae9c28f31c8c1 \
+    --hash=sha256:8a5b695dbb406c0648745ea48f7786dd7c6646c1a27caa62dfaceaedb5d013be \
+    --hash=sha256:ad544c4f90d1ac0875dd35b787752d2d051d15666dfb665fb9b9bc8446db2e49 \
+    --hash=sha256:c1e31eed946b8fc6730a426ca818cb9de5ecb6344223cafe6a4da7b05fd3bb32 \
+    --hash=sha256:ead452d118a0150a2a1737e8b42263fc6e94d478d96812de1b82a54f199cf513
     # via -r requirements.in
 colorama==0.4.6 \
     --hash=sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44 \