diff --git a/server/src/knexconfig.ts b/server/src/knexconfig.ts
index 1d88861f9490f068d4e32b7923478815130f0dd6..0faa1cf2a9749b0b0f0412511859e93688bdac72 100644
--- a/server/src/knexconfig.ts
+++ b/server/src/knexconfig.ts
@@ -25,7 +25,7 @@ export default {
     },
     production: {
         client: "postgresql",
-        connection: env.DATABASE_URL ?? {
+        connection: `${env.DATABASE_URL}?ssl=true` ?? {
             database: "ryoko",
             user: "postgres",
             password: ""