diff --git a/functional/otlp/Dockerfile b/functional/otlp/Dockerfile
index 79e09d61ba..fc27aa9947 100644
--- a/functional/otlp/Dockerfile
+++ b/functional/otlp/Dockerfile
@@ -1,7 +1,7 @@
 # Copyright The OpenTelemetry Authors
 # SPDX-License-Identifier: Apache-2.0
 
-FROM otel/opentelemetry-collector
+FROM otel/opentelemetry-collector:0.115.1
 COPY . .
 CMD ["--config", "/otel-cpp/otel-config.yaml"]
 EXPOSE 4318