diff --git a/docker/Dockerfile.worker b/docker/Dockerfile.worker
index f814f07e2..e9a679a91 100644
--- a/docker/Dockerfile.worker
+++ b/docker/Dockerfile.worker
@@ -1,4 +1,4 @@
-FROM python:3-slim as builder
+FROM python:3.11-slim as builder
 
 WORKDIR /app/
 
@@ -19,7 +19,7 @@ RUN python3 -m venv /app/.venv && \
     pip install --no-cache-dir --index-url https://download.pytorch.org/whl/cpu torch && \
     pip install --no-cache-dir -e /app/
 
-FROM python:3-slim
+FROM python:3.11-slim
 
 WORKDIR /app
 
diff --git a/src/core/pyproject.toml b/src/core/pyproject.toml
index be051cbfb..cc731dd73 100644
--- a/src/core/pyproject.toml
+++ b/src/core/pyproject.toml
@@ -14,7 +14,7 @@ classifiers = [
 ]
 requires-python = ">=3.11"
 dependencies = [
-    "Flask",
+    "Flask==2.3.3",
     "Flask-Cors",
     "Flask-JWT-Extended",
     "Flask-Migrate",