diff --git a/weblate_web/pdf.py b/weblate_web/pdf.py
index d791d7a5f8..244bea121d 100644
--- a/weblate_web/pdf.py
+++ b/weblate_web/pdf.py
@@ -59,19 +59,11 @@ def render_pdf(*, html: str, output: Path) -> None:
         string=html,
         url_fetcher=url_fetcher,
     )
+    fonts_css = finders.find("pdf/fonts.css")
+    if fonts_css is None:
+        raise ValueError("Could not load fonts CSS")
     font_style = CSS(
-        string="""
-        @font-face {
-          font-family: Source Sans Pro;
-          font-weight: 400;
-          src: url("static:vendor/font-source/TTF/SourceSans3-Regular.ttf");
-        }
-        @font-face {
-          font-family: Source Sans Pro;
-          font-weight: 700;
-          src: url("static:vendor/font-source/TTF/SourceSans3-Bold.ttf");
-        }
-    """,
+        filename=fonts_css,
         font_config=font_config,
         url_fetcher=url_fetcher,
     )
diff --git a/weblate_web/static/pdf/fonts.css b/weblate_web/static/pdf/fonts.css
new file mode 100644
index 0000000000..2c68cfd68c
--- /dev/null
+++ b/weblate_web/static/pdf/fonts.css
@@ -0,0 +1,10 @@
+@font-face {
+  font-family: Source Sans Pro;
+  font-weight: 400;
+  src: url("static:vendor/font-source/TTF/SourceSans3-Regular.ttf");
+}
+@font-face {
+  font-family: Source Sans Pro;
+  font-weight: 700;
+  src: url("static:vendor/font-source/TTF/SourceSans3-Bold.ttf");
+}