diff --git a/debian/templates/apache-shared.conf b/debian/templates/apache-shared.conf
index b923578e0b..e3ad79cc04 100644
--- a/debian/templates/apache-shared.conf
+++ b/debian/templates/apache-shared.conf
@@ -36,7 +36,8 @@ SetEnv PERL5LIB "/usr/share/koha/lib"
 <IfModule mod_deflate.c>
     # Compress content with type html, text, and css, ...
     AddOutputFilterByType DEFLATE text/plain text/html text/xml text/css
-    AddOutputFilterByType DEFLATE application/xml application/xhtml+xml application/rss+xml application/javascript application/x-javascript
+    AddOutputFilterByType DEFLATE application/xml application/xhtml+xml application/rss+xml
+    AddOutputFilterByType DEFLATE application/javascript application/x-javascript application/json
 
     DeflateCompressionLevel 9
 
diff --git a/etc/koha-httpd.conf b/etc/koha-httpd.conf
index 867d309977..3c68189f2f 100644
--- a/etc/koha-httpd.conf
+++ b/etc/koha-httpd.conf
@@ -61,7 +61,8 @@
 
     # Compress content with type html, text, and css, ...
     AddOutputFilterByType DEFLATE text/plain text/html text/xml text/css
-    AddOutputFilterByType DEFLATE application/xml application/xhtml+xml application/rss+xml application/javascript application/x-javascript
+    AddOutputFilterByType DEFLATE application/xml application/xhtml+xml application/rss+xml
+    AddOutputFilterByType DEFLATE application/javascript application/x-javascript application/json
 
     DeflateCompressionLevel 9