diff --git a/langchain4j-embeddings/src/main/java/dev/langchain4j/model/embedding/onnx/OnnxBertBiEncoder.java b/langchain4j-embeddings/src/main/java/dev/langchain4j/model/embedding/onnx/OnnxBertBiEncoder.java
index 23d9adc..17499f3 100644
--- a/langchain4j-embeddings/src/main/java/dev/langchain4j/model/embedding/onnx/OnnxBertBiEncoder.java
+++ b/langchain4j-embeddings/src/main/java/dev/langchain4j/model/embedding/onnx/OnnxBertBiEncoder.java
@@ -197,6 +197,10 @@ private static float[] meanPool(float[][] vectors) {
     }
 
     private float[] weightedAverage(List<float[]> embeddings, List<Integer> weights) {
+        if (embeddings.isEmpty()) {
+            throw new RuntimeException("Embeddings list cannot be empty");
+        }
+
         if (embeddings.size() == 1) {
             return embeddings.get(0);
         }