diff --git a/specter/lib/FontCache.cpp b/specter/lib/FontCache.cpp
index ca0ea97cd..bfff95d2e 100644
--- a/specter/lib/FontCache.cpp
+++ b/specter/lib/FontCache.cpp
@@ -632,7 +632,7 @@ FontTag FontCache::prepCustomFont(std::string_view name, FT_Face face, FCharFilt
   }
 
   /* Now check filesystem cache */
-  hecl::SystemString cachePath = m_cacheRoot + _SYS_STR('/') + fmt::format(fmt(_SYS_STR("{}")), tag.hash());
+  hecl::SystemString cachePath = m_cacheRoot + _SYS_STR('/') + fmt::format(fmt(_SYS_STR("{:x}")), tag.hash());
   hecl::Sstat st;
   if (!hecl::Stat(cachePath.c_str(), &st) && S_ISREG(st.st_mode)) {
     athena::io::FileReader r(cachePath);
diff --git a/specter/zeus b/specter/zeus
index 97cec5304..6ac3066a6 160000
--- a/specter/zeus
+++ b/specter/zeus
@@ -1 +1 @@
-Subproject commit 97cec53046f8c646e6787aafb6f23b3e5ec82221
+Subproject commit 6ac3066a6f1c5d9ebee07eaf0f5aea849b935585