diff --git a/requirements-dev.txt b/requirements-dev.txt
index 7a9b09ba..0c983114 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -8,7 +8,7 @@ opensearch-py>=2.2.0
 torch>=2.5.0,<2.6
 onnx>=1.15.0
 accelerate>=0.27
-sentence_transformers>=2.5.0,<2.6
+sentence_transformers>=2.5.0,<4.2
 tqdm>4.66.0,<5
 # transformers 4.50.0 uses torch.compiler interface. Which isn't introduced for torch version <2.1.0.
 transformers>=4.47.0,<4.50.0
diff --git a/requirements.txt b/requirements.txt
index 197919db..8850255c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ opensearch-py>=2.2.0
 torch>=2.5.0,<2.6
 onnx>=1.15.0
 accelerate>=0.27
-sentence_transformers>=2.5.0,<2.6
+sentence_transformers>=2.5.0,<4.2
 tqdm>4.66.0,<5
 transformers>=4.47.0,<4.50.0
 deprecated>=1.2.14,<2