diff --git a/CHANGES.rst b/CHANGES.rst
index 2b52c9d..8d64516 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,16 @@
 CHANGES
 =======
 
+4.2.0 (Unreleased)
+------------------
+
+General:
+
+* #149 django-redshift-backend depends directly on psycopg2.
+  If you want to use psycopg2 pre-built packages, please refer to
+  the following site for more information: 
+  https://www.psycopg.org/docs/install.html
+
 4.1.1 (2024/08/20)
 ------------------
 
diff --git a/pyproject.toml b/pyproject.toml
index edef721..a213c41 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,13 +36,11 @@ classifiers = [
 ]
 dependencies = [
     "django<5",
+    "psycopg2",
     "backports.zoneinfo;python_version<'3.9'",
 ]
 
 [project.optional-dependencies]
-psycopg2 = [
-    "psycopg2",
-]
 psycopg2-binary = [
     "psycopg2-binary",
 ]
diff --git a/tox.ini b/tox.ini
index 95be6e0..f4fb68d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -23,7 +23,6 @@ DJANGO =
 [testenv]
 deps =
     coverage
-    psycopg2-binary>=2.7
     pytest
     pytest-cov
     mock>=2.0