diff --git a/requirements_cove.txt b/requirements_cove.txt
index 047ad8f..597bb2e 100644
--- a/requirements_cove.txt
+++ b/requirements_cove.txt
@@ -12,7 +12,7 @@ attrs==25.3.0
     # via jsonschema
 backports-datetime-fromisoformat==2.0.3
     # via flattentool
-bleach==6.2.0
+bleach==6.4.0
     # via -r requirements_cove.in
 btrees==6.1
     # via zodb
diff --git a/requirements_cove_dev.txt b/requirements_cove_dev.txt
index 025fda5..00e6281 100644
--- a/requirements_cove_dev.txt
+++ b/requirements_cove_dev.txt
@@ -22,7 +22,7 @@ backports-datetime-fromisoformat==2.0.3
     # via flattentool
 black==26.3.1
     # via -r requirements_cove_dev.in
-bleach==6.2.0
+bleach==6.4.0
     # via -r requirements_cove.in
 btrees==6.1
     # via zodb
diff --git a/requirements_cove_dokku.txt b/requirements_cove_dokku.txt
index 11ce374..c6b5889 100644
--- a/requirements_cove_dokku.txt
+++ b/requirements_cove_dokku.txt
@@ -18,7 +18,7 @@ backports-datetime-fromisoformat==2.0.3
     # via
     #   -r requirements_cove.txt
     #   flattentool
-bleach==6.2.0
+bleach==6.4.0
     # via -r requirements_cove.txt
 btrees==6.1
     # via