diff --git a/app/matrix/matrix.0x3c.pl.jsonnet b/app/matrix/matrix.0x3c.pl.jsonnet
index 5a580adf..7f9a71b5 100644
--- a/app/matrix/matrix.0x3c.pl.jsonnet
+++ b/app/matrix/matrix.0x3c.pl.jsonnet
@@ -9,6 +9,12 @@ matrix {
         namespace: "matrix-0x3c",
         webDomain: "matrix.0x3c.pl",
         serverName: "0x3c.pl",
+
+        images+: {
+            # We are using patched version for 0x3c now, to not break other configs
+            casProxy: "registry.k0.hswaw.net/informatic/oauth2-cas-proxy:0.1.5",
+        },
+
         cas: {
             enable: true,
             oauth2: {