diff --git a/django/db/backends/postgresql/operations.py b/django/db/backends/postgresql/operations.py
index 20392b2..bd8266b 100644
--- a/django/db/backends/postgresql/operations.py
+++ b/django/db/backends/postgresql/operations.py
@@ -12,7 +12,22 @@ class DatabaseOperations(BaseDatabaseOperations):
             from django.db import connection
             cursor = connection.cursor()
             cursor.execute("SELECT version()")
-            self._postgres_version = [int(val) for val in cursor.fetchone()[0].split()[1].split('.')]
+            version_parts = cursor.fetchone()[0].split()[1].split('.')
+            postgres_version = []
+            for part in version_parts:
+                if part.isdigit():
+                    postgres_version.append(int(part))
+                else:
+                    digit = ""
+                    for c in part:
+                        if c.isdigit():
+                            digit += c
+                        else:
+                            break
+                    if digit != "":
+                        postgres_version.append(int(digit))
+                    break
+            self._postgres_version = postgres_version
         return self._postgres_version
     postgres_version = property(_get_postgres_version)