diff --git a/SalishSeaTools/envs/requirements.txt b/SalishSeaTools/envs/requirements.txt
index 4548a3f7..baf7ed0e 100644
--- a/SalishSeaTools/envs/requirements.txt
+++ b/SalishSeaTools/envs/requirements.txt
@@ -21,7 +21,7 @@ backports.tarfile==1.2.0
 backports.zstd==1.3.0
 beautifulsoup4==4.14.3
 black==26.3.1
-bleach==6.3.0
+bleach==6.4.0
 Bottleneck==1.6.0
 Brotli==1.2.0
 cached-property==1.5.2