diff --git a/eng/requirements-build-macos.txt b/eng/requirements-build-macos.txt
index 642c60e96..b4c1a40d2 100644
--- a/eng/requirements-build-macos.txt
+++ b/eng/requirements-build-macos.txt
@@ -106,9 +106,9 @@ black==26.5.1 \
     --hash=sha256:ecb3e624844c798144e9bd986954e0adc81d8911a1f30f375e1252fe26e8c294 \
     --hash=sha256:ed1a20af114c301a0269bf01163d51dbef72737fd65f850001e7cbe7f3c7abae
     # via -r eng/../requirements.txt
-certifi==2026.7.22 \
-    --hash=sha256:62f22742b58a1a33014a2b6b706588a8d7e2a88ae7bd1a6ebe8c992928483775 \
-    --hash=sha256:741e2c3b351ddf169a738da9f2c048608ff7f2c5cc02f1ebc6b118bb090d5d55
+certifi==2026.10.18 \
+    --hash=sha256:73191c47aaa79da394e8fee2dbc2ec827432cab56311122c9e47abf79e390f62 \
+    --hash=sha256:b9995d97b64d0431a5af837d8ca8cd6238104d1f319f04bd93ea43124d6c861e
     # via requests
 cffi==2.1.1 ; platform_python_implementation != 'PyPy' \
     --hash=sha256:046bfc24911b37851ee1b51aab8bffe713d89c68c6a057b09484ce9fd5f69b4e \
diff --git a/eng/requirements-build-odbc.txt b/eng/requirements-build-odbc.txt
index 8fb5e3abb..658823e72 100644
--- a/eng/requirements-build-odbc.txt
+++ b/eng/requirements-build-odbc.txt
@@ -6,9 +6,9 @@ build==1.6.0 \
     --hash=sha256:bd2c8afc603e7a2e0ce70e2ea85f0a6d02043bafbd307f5bada0f98669eca5af \
     --hash=sha256:f7aaf1ebbb79178a02ba248bb524f2176b256017e17e8e4bd4289c7b38cc2bad
     # via -r eng/requirements-build-odbc.in
-certifi==2026.7.22 \
-    --hash=sha256:62f22742b58a1a33014a2b6b706588a8d7e2a88ae7bd1a6ebe8c992928483775 \
-    --hash=sha256:741e2c3b351ddf169a738da9f2c048608ff7f2c5cc02f1ebc6b118bb090d5d55
+certifi==2026.10.18 \
+    --hash=sha256:73191c47aaa79da394e8fee2dbc2ec827432cab56311122c9e47abf79e390f62 \
+    --hash=sha256:b9995d97b64d0431a5af837d8ca8cd6238104d1f319f04bd93ea43124d6c861e
     # via requests
 charset-normalizer==3.5.1 \
     --hash=sha256:00668ebb0609751758682eb0b5857e7c35b9f00e84dfdef062e103244ec94d45 \
diff --git a/eng/requirements-test-linux.txt b/eng/requirements-test-linux.txt
index d7a427168..092ec06cd 100644
--- a/eng/requirements-test-linux.txt
+++ b/eng/requirements-test-linux.txt
@@ -106,9 +106,9 @@ black==26.5.1 \
     --hash=sha256:ecb3e624844c798144e9bd986954e0adc81d8911a1f30f375e1252fe26e8c294 \
     --hash=sha256:ed1a20af114c301a0269bf01163d51dbef72737fd65f850001e7cbe7f3c7abae
     # via -r eng/../requirements.txt
-certifi==2026.7.22 \
-    --hash=sha256:62f22742b58a1a33014a2b6b706588a8d7e2a88ae7bd1a6ebe8c992928483775 \
-    --hash=sha256:741e2c3b351ddf169a738da9f2c048608ff7f2c5cc02f1ebc6b118bb090d5d55
+certifi==2026.10.18 \
+    --hash=sha256:73191c47aaa79da394e8fee2dbc2ec827432cab56311122c9e47abf79e390f62 \
+    --hash=sha256:b9995d97b64d0431a5af837d8ca8cd6238104d1f319f04bd93ea43124d6c861e
     # via requests
 cffi==2.1.1 ; platform_python_implementation != 'PyPy' \
     --hash=sha256:046bfc24911b37851ee1b51aab8bffe713d89c68c6a057b09484ce9fd5f69b4e \