diff --git a/.github/workflows/bygg.yml b/.github/workflows/bygg.yml
index bbc017364..c860d0aee 100644
--- a/.github/workflows/bygg.yml
+++ b/.github/workflows/bygg.yml
@@ -100,7 +100,7 @@ jobs:
   bygg-epub:
     name: 'Bygg EPUB (experimentell)'
     continue-on-error: true
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
       - name: 'Checka ut koden'
         uses: actions/checkout@v4
diff --git a/Makefile b/Makefile
index 7c8f40fba..af86f1f3f 100644
--- a/Makefile
+++ b/Makefile
@@ -106,7 +106,8 @@ koncept.pdf: $(REPO_FILES) koncept.tex $(KONCEPT_FILES)
 	latexmk -pdf koncept.tex
 
 koncept.epub: $(REPO_FILES) koncept.tex $(KONCEPT_FILES)
-	ebb -x images/**/*
+	ebb -x images/**.png
+	ebb -x images/**.pdf
 	tex4ebook --loglevel debug --format epub3 --tidy koncept.tex "mathml"
 
 koncept.tar.gz: Makefile $(KONCEPT_FILES)