diff --git a/config/apache/standardebooks.test.conf b/config/apache/standardebooks.test.conf
index 46c77da4..4c86eca7 100644
--- a/config/apache/standardebooks.test.conf
+++ b/config/apache/standardebooks.test.conf
@@ -16,16 +16,16 @@ Protocols		h2 h2c http/1.1
 
 # Set up caching directives for infrequently changed files
 ExpiresActive		on
-ExpiresByType		application/javascript		"access plus 1 month"
-ExpiresByType		font/woff2			"access plus 1 month"
-ExpiresByType		image/avif			"access plus 1 month"
-ExpiresByType		image/gif			"access plus 1 month"
-ExpiresByType		image/jpeg			"access plus 1 month"
-ExpiresByType		image/png			"access plus 1 month"
-ExpiresByType		image/svg+xml			"access plus 1 month"
-ExpiresByType		image/vnd.microsoft.icon	"access plus 1 month"
-ExpiresByType		image/x-icon			"access plus 1 month"
-ExpiresByType		text/css			"access plus 1 month"
+ExpiresByType		application/javascript		"access plus 6 months"
+ExpiresByType		font/woff2			"access plus 6 months"
+ExpiresByType		image/avif			"access plus 6 months"
+ExpiresByType		image/gif			"access plus 6 months"
+ExpiresByType		image/jpeg			"access plus 6 months"
+ExpiresByType		image/png			"access plus 6 months"
+ExpiresByType		image/svg+xml			"access plus 6 months"
+ExpiresByType		image/vnd.microsoft.icon	"access plus 6 months"
+ExpiresByType		image/x-icon			"access plus 6 months"
+ExpiresByType		text/css			"access plus 6 months"
 
 # These lines are a workaround for an Apache bug that prevents mod_deflate, etags, and ExpiresByType working at the same time.
 # This is probably still broken in 18.04.  See https://stackoverflow.com/questions/896974/apache-is-not-sending-304-response-if-mod-deflate-and-addoutputfilterbytype-is