diff --git a/.ci/Ubuntu26.04/Dockerfile b/.ci/Ubuntu26.04/Dockerfile
index ac0f22a2d..7b0cd389f 100644
--- a/.ci/Ubuntu26.04/Dockerfile
+++ b/.ci/Ubuntu26.04/Dockerfile
@@ -3,6 +3,7 @@ FROM ubuntu:26.04
 RUN apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
         build-essential \
+        ca-certificates \
         ccache \
         clang-format \
         cmake \