diff --git a/requirements/constraints.txt b/requirements/constraints.txt
index dd9c6a62d58..92352aa0219 100644
--- a/requirements/constraints.txt
+++ b/requirements/constraints.txt
@@ -45,7 +45,7 @@ cffi==2.0.0
     #   pytest-codspeed
 cfgv==3.5.0
     # via pre-commit
-charset-normalizer==3.4.4
+charset-normalizer==3.4.5
     # via requests
 click==8.3.1
     # via
@@ -138,7 +138,7 @@ pip-tools==7.5.3
     # via -r requirements/dev.in
 pkgconfig==1.5.5
     # via -r requirements/test-common.in
-platformdirs==4.9.1
+platformdirs==4.9.4
     # via
     #   python-discovery
     #   virtualenv
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 46c5cc27f0c..eb266b1ee7b 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -45,7 +45,7 @@ cffi==2.0.0
     #   pytest-codspeed
 cfgv==3.5.0
     # via pre-commit
-charset-normalizer==3.4.4
+charset-normalizer==3.4.5
     # via requests
 click==8.3.1
     # via
@@ -135,7 +135,7 @@ pip-tools==7.5.3
     # via -r requirements/dev.in
 pkgconfig==1.5.5
     # via -r requirements/test-common.in
-platformdirs==4.9.1
+platformdirs==4.9.4
     # via
     #   python-discovery
     #   virtualenv
diff --git a/requirements/doc-spelling.txt b/requirements/doc-spelling.txt
index b30bdb56929..ab02b457683 100644
--- a/requirements/doc-spelling.txt
+++ b/requirements/doc-spelling.txt
@@ -12,7 +12,7 @@ babel==2.18.0
     # via sphinx
 certifi==2026.2.25
     # via requests
-charset-normalizer==3.4.4
+charset-normalizer==3.4.5
     # via requests
 click==8.3.1
     # via towncrier
diff --git a/requirements/doc.txt b/requirements/doc.txt
index d960803537f..c8aac7adae0 100644
--- a/requirements/doc.txt
+++ b/requirements/doc.txt
@@ -12,7 +12,7 @@ babel==2.18.0
     # via sphinx
 certifi==2026.2.25
     # via requests
-charset-normalizer==3.4.4
+charset-normalizer==3.4.5
     # via requests
 click==8.3.1
     # via towncrier
diff --git a/requirements/lint.txt b/requirements/lint.txt
index a61241e30d1..51aa8443997 100644
--- a/requirements/lint.txt
+++ b/requirements/lint.txt
@@ -61,7 +61,7 @@ packaging==26.0
     # via pytest
 pathspec==1.0.4
     # via mypy
-platformdirs==4.9.1
+platformdirs==4.9.4
     # via
     #   python-discovery
     #   virtualenv