diff --git a/index/Dockerfile b/index/Dockerfile
index 798a13f..3fbf72c 100644
--- a/index/Dockerfile
+++ b/index/Dockerfile
@@ -10,8 +10,8 @@ RUN apt-get update \
     && apt-get install -y --no-install-recommends \
         virtualenv \
     && mkdir /virtualenv \
-    && virtualenv /virtualenv/python3.11 \
-    && . /virtualenv/python3.11/bin/activate \
+    && virtualenv /virtualenv/python3.10 \
+    && . /virtualenv/python3.10/bin/activate \
     # Developer convenience
     && apt-get install -y --no-install-recommends \
         git \
@@ -34,8 +34,8 @@ RUN apt-get update \
     && apt-get autoremove \
     && rm -rf /var/lib/{apt,dpkg,cache,log}
 
-ENV VIRTUAL_ENV /virtualenv/python3.11
-ENV PATH /virtualenv/python3.11/bin:$PATH
+ENV VIRTUAL_ENV /virtualenv/python3.10
+ENV PATH /virtualenv/python3.10/bin:$PATH
 
 COPY requirements.txt constraints.txt version.txt /conf/
 
diff --git a/index/version.txt b/index/version.txt
index d15723f..1c09c74 100644
--- a/index/version.txt
+++ b/index/version.txt
@@ -1 +1 @@
-0.3.2
+0.3.3