diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b0301def..f3767469 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -23,12 +23,14 @@ build_docs:
       - $PKG_ONLY == "1"
 
 build_meson:
+  image: debian:bookworm
   stage: build
   artifacts:
     paths:
       - _build
     expire_in: 3h
   script:
+    - mv debian/control-newer debian/control
     - apt-get -y build-dep .
     - meson . _build/ -Ddepdatadir=/usr/share --werror
     - ninja -C _build install
@@ -96,6 +98,7 @@ build_deb:future:
     - cp ../*.deb .
 
 build_reference:
+  image: debian:bookworm
   stage: build
   needs:
     - job: build_meson
@@ -124,11 +127,13 @@ test_lintian:
       - $PKG_ONLY == "1"
 
 test:
+  image: debian:bookworm
   stage: test
   needs:
     - job: build_meson
       artifacts: true
   script:
+    - mv debian/control-newer debian/control
     - apt-get -y build-dep .
     - apt-get -y install clang-tidy
     - ninja -C _build test
diff --git a/Cargo.deps.online b/Cargo.deps.online
index f1973045..54e8e17e 100644
--- a/Cargo.deps.online
+++ b/Cargo.deps.online
@@ -2,7 +2,3 @@
 [patch.crates-io]
 # Dependency was yanked, but gio 0.7 needs it.
 fragile = { git = "https://source.puri.sm/dorota.czaplejewicz/fragile.git", tag = "0.3.0" }
-
-# Override automatic upgrade done in serde_yaml.
-[dependencies.indexmap]
-version = "1.8.*"