diff --git a/pyconkr/external_apis/pretalx/client.py b/pyconkr/external_apis/pretalx/client.py
index 6b39dc6..4656306 100644
--- a/pyconkr/external_apis/pretalx/client.py
+++ b/pyconkr/external_apis/pretalx/client.py
@@ -43,7 +43,7 @@ def list_sessions(self, event_name: str, only_confirmed: bool = True) -> dict:
         """세션 목록 조회"""
         query_params = {"limit": 300, "state": "confirmed" if only_confirmed else None}
         filtered_query_params = {k: v for k, v in query_params.items() if v is not None}
-        endpoint = f"api/events/{event_name}/submissions?{urllib.parse.urlencode(filtered_query_params)}"
+        endpoint = f"api/events/{event_name}/submissions/?{urllib.parse.urlencode(filtered_query_params)}"
 
         try:
             result = self._request("GET", endpoint)
@@ -54,7 +54,7 @@ def list_sessions(self, event_name: str, only_confirmed: bool = True) -> dict:
 
     def retrieve_session(self, event_name: str, session_id: int) -> dict:
         """세션 상세 조회"""
-        endpoint = f"api/events/{event_name}/submissions/{session_id}"
+        endpoint = f"api/events/{event_name}/submissions/{session_id}/"
 
         try:
             result = self._request("GET", endpoint)
diff --git a/pyconkr/settings-dev.py b/pyconkr/settings-dev.py
index b69f580..fd07976 100644
--- a/pyconkr/settings-dev.py
+++ b/pyconkr/settings-dev.py
@@ -13,17 +13,28 @@
 ]
 
 # RDS
-DATABASES = {
-    "default": {
-        # "ENGINE": "mysql.connector.django",
-        "ENGINE": "django.db.backends.mysql",
-        "NAME": os.getenv("AWS_RDS_DATABASE"),
-        "USER": os.getenv("AWS_RDS_USER_ID"),
-        "PASSWORD": os.getenv("AWS_RDS_PW"),
-        "HOST": os.getenv("AWS_RDS_HOST"),
-        "PORT": os.getenv("AWS_RDS_PORT"),
+if os.environ.get("AWS_PSQL_HOST"):
+    DATABASES = {
+        "default": {
+            "ENGINE": "django.db.backends.postgresql",
+            "HOST": os.getenv("AWS_PSQL_HOST"),
+            "PORT": os.getenv("AWS_PSQL_PORT"),
+            "NAME": os.getenv("AWS_PSQL_DATABASE"),
+            "USER": os.getenv("AWS_PSQL_USER_ID"),
+            "PASSWORD": os.getenv("AWS_PSQL_PW"),
+        }
+    }
+else:
+    DATABASES = {
+        "default": {
+            "ENGINE": "django.db.backends.mysql",
+            "NAME": os.getenv("AWS_RDS_DATABASE"),
+            "USER": os.getenv("AWS_RDS_USER_ID"),
+            "PASSWORD": os.getenv("AWS_RDS_PW"),
+            "HOST": os.getenv("AWS_RDS_HOST"),
+            "PORT": os.getenv("AWS_RDS_PORT"),
+        }
     }
-}
 
 # django-storages: S3
 del MEDIA_ROOT
diff --git a/pyconkr/settings-prod.py b/pyconkr/settings-prod.py
index 30d8047..cbe8b52 100644
--- a/pyconkr/settings-prod.py
+++ b/pyconkr/settings-prod.py
@@ -13,17 +13,28 @@
 ]
 
 # RDS
-DATABASES = {
-    "default": {
-        # "ENGINE": "mysql.connector.django",
-        "ENGINE": "django.db.backends.mysql",
-        "NAME": os.getenv("AWS_RDS_DATABASE"),
-        "USER": os.getenv("AWS_RDS_USER_ID"),
-        "PASSWORD": os.getenv("AWS_RDS_PW"),
-        "HOST": os.getenv("AWS_RDS_HOST"),
-        "PORT": os.getenv("AWS_RDS_PORT"),
+if os.environ.get("AWS_PSQL_HOST"):
+    DATABASES = {
+        "default": {
+            "ENGINE": "django.db.backends.postgresql",
+            "HOST": os.getenv("AWS_PSQL_HOST"),
+            "PORT": os.getenv("AWS_PSQL_PORT"),
+            "NAME": os.getenv("AWS_PSQL_DATABASE"),
+            "USER": os.getenv("AWS_PSQL_USER_ID"),
+            "PASSWORD": os.getenv("AWS_PSQL_PW"),
+        }
+    }
+else:
+    DATABASES = {
+        "default": {
+            "ENGINE": "django.db.backends.mysql",
+            "NAME": os.getenv("AWS_RDS_DATABASE"),
+            "USER": os.getenv("AWS_RDS_USER_ID"),
+            "PASSWORD": os.getenv("AWS_RDS_PW"),
+            "HOST": os.getenv("AWS_RDS_HOST"),
+            "PORT": os.getenv("AWS_RDS_PORT"),
+        }
     }
-}
 
 # django-storages: S3
 del MEDIA_ROOT
diff --git a/requirements-local.txt b/requirements-local.txt
index fcdeb46..33f3679 100644
--- a/requirements-local.txt
+++ b/requirements-local.txt
@@ -23,3 +23,4 @@ django-cors-headers==3.14.0
 requests==2.28.2
 django-picklefield==3.1
 setuptools==74.1.2
+psycopg2-binary==2.9.10
diff --git a/requirements.txt b/requirements.txt
index 2b9839a..b279e93 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,3 +26,4 @@ django-cors-headers==3.14.0
 requests==2.28.2
 PyFunctional==1.4.3
 pymysql==1.0.3
+psycopg2-binary==2.9.10
diff --git a/sponsor/admin.py b/sponsor/admin.py
index cf92fd9..e62b8ec 100644
--- a/sponsor/admin.py
+++ b/sponsor/admin.py
@@ -20,7 +20,6 @@ class SponsorAdmin(SummernoteModelAdmin):
         "submitted",
         "accepted",
         "paid_at",
-        "year",
     )
     list_filter = ("accepted", "submitted", "paid_at")
     ordering = ("-created_at",)