diff --git a/backend/requirements.txt b/backend/requirements.txt
index 23bb7710f0..cb90cf1c8e 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -64,7 +64,7 @@ oracledb==3.2.0
 
 av==14.0.1 # Caution: Set due to FATAL FIPS SELFTEST FAILURE, see discussion https://github.com/open-webui/open-webui/discussions/15720
 transformers
-sentence-transformers==4.1.0
+sentence-transformers==5.1.1
 accelerate
 colbert-ai==0.2.21
 pyarrow==20.0.0 # fix: pin pyarrow version to 20 for rpi compatibility #15897
diff --git a/pyproject.toml b/pyproject.toml
index aa2825fa69..98e0f860a0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -62,7 +62,7 @@ dependencies = [
     "opensearch-py==2.8.0",
     
     "transformers",
-    "sentence-transformers==4.1.0",
+    "sentence-transformers==5.1.1",
     "accelerate",
     "pyarrow==20.0.0",
     "einops==0.8.1",