diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4bf6468a..24ed965e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -8,7 +8,7 @@ linux-x86_64-binaries:
     - apt-get update && apt-get -y install build-essential libgtk2.0-dev libpulse-dev mesa-common-dev libgtksourceview2.0-dev libcairo2-dev libsdl1.2-dev libxv-dev libao-dev libopenal-dev libudev-dev mkdocs
     - make -C icarus compiler=g++
     - make -C higan compiler=g++
-    - mkdocs build
+    - LC_ALL=C.UTF-8 mkdocs build
     - mkdir higan-nightly
     - cp -a icarus/out/icarus higan-nightly/icarus
     - cp -a icarus/Database higan-nightly/
@@ -31,7 +31,7 @@ windows-x86_64-binaries:
     - sed -i -e 's/-lole32/& -static -lpthread/' nall/GNUmakefile
     - make -C icarus platform=windows compiler="x86_64-w64-mingw32-g++ -static-libgcc -static-libstdc++" windres="x86_64-w64-mingw32-windres"
     - make -C higan platform=windows compiler="x86_64-w64-mingw32-g++ -static-libgcc -static-libstdc++" windres="x86_64-w64-mingw32-windres"
-    - mkdocs build
+    - LC_ALL=C.UTF-8 mkdocs build
     - mkdir higan-nightly
     - cp -a icarus/out/icarus higan-nightly/icarus.exe
     - cp -a icarus/Database higan-nightly/