diff --git a/requirements/base.txt b/requirements/base.txt
index b82b11f1030..feac73173fa 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -24,7 +24,7 @@ gunicorn==23.0.0
     # via -r requirements/base.in
 idna==3.6
     # via yarl
-multidict==6.6.2
+multidict==6.6.3
     # via
     #   -r requirements/runtime-deps.in
     #   yarl
diff --git a/requirements/constraints.txt b/requirements/constraints.txt
index 8fa0e20e228..d6c5008f129 100644
--- a/requirements/constraints.txt
+++ b/requirements/constraints.txt
@@ -113,7 +113,7 @@ markupsafe==3.0.2
     # via jinja2
 mdurl==0.1.2
     # via markdown-it-py
-multidict==6.6.2
+multidict==6.6.3
     # via
     #   -r requirements/multidict.in
     #   -r requirements/runtime-deps.in
diff --git a/requirements/cython.txt b/requirements/cython.txt
index b74caa3bc61..1194857bdfe 100644
--- a/requirements/cython.txt
+++ b/requirements/cython.txt
@@ -6,7 +6,7 @@
 #
 cython==3.1.2
     # via -r requirements/cython.in
-multidict==6.6.2
+multidict==6.6.3
     # via -r requirements/multidict.in
 typing-extensions==4.14.0
     # via multidict
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 02a46d40d6e..63021cce858 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -111,7 +111,7 @@ markupsafe==3.0.2
     # via jinja2
 mdurl==0.1.2
     # via markdown-it-py
-multidict==6.6.2
+multidict==6.6.3
     # via
     #   -r requirements/runtime-deps.in
     #   yarl
diff --git a/requirements/multidict.txt b/requirements/multidict.txt
index 5868b9f430f..99888e27364 100644
--- a/requirements/multidict.txt
+++ b/requirements/multidict.txt
@@ -4,7 +4,7 @@
 #
 #    pip-compile --allow-unsafe --output-file=requirements/multidict.txt --resolver=backtracking --strip-extras requirements/multidict.in
 #
-multidict==6.6.2
+multidict==6.6.3
     # via -r requirements/multidict.in
 typing-extensions==4.14.0
     # via multidict
diff --git a/requirements/runtime-deps.txt b/requirements/runtime-deps.txt
index ab1d85a5d34..84908059ad0 100644
--- a/requirements/runtime-deps.txt
+++ b/requirements/runtime-deps.txt
@@ -22,7 +22,7 @@ frozenlist==1.7.0
     #   aiosignal
 idna==3.6
     # via yarl
-multidict==6.6.2
+multidict==6.6.3
     # via
     #   -r requirements/runtime-deps.in
     #   yarl
diff --git a/requirements/test.txt b/requirements/test.txt
index 42506c96894..4a6bec4bc7c 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -57,7 +57,7 @@ markdown-it-py==3.0.0
     # via rich
 mdurl==0.1.2
     # via markdown-it-py
-multidict==6.6.2
+multidict==6.6.3
     # via
     #   -r requirements/runtime-deps.in
     #   yarl