diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2398736..821f096 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## v4.0.3 (2021-11-18)
+### Fixes
+- setup.py: require `psycopg2-binary` instead of `psycopg2`.
+
 ## v4.0.3 (2021-10-09)
 ### Fixes
 - Test python 3.10 in CI.
diff --git a/VERSION b/VERSION
index c4e41f9..c5106e6 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.0.3
+4.0.4
diff --git a/requirements.txt b/requirements.txt
index 9a7f046..44e0eea 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 #
 #    pip-compile --no-emit-index-url
 #
-alembic==1.7.4
+alembic==1.7.5
     # via chartreuse (setup.py)
 cachetools==4.2.4
     # via google-auth
@@ -12,27 +12,27 @@ certifi==2021.10.8
     # via
     #   kubernetes
     #   requests
-charset-normalizer==2.0.6
+charset-normalizer==2.0.7
     # via requests
-google-auth==2.3.0
+google-auth==2.3.3
     # via kubernetes
 greenlet==1.1.2
     # via sqlalchemy
-idna==3.2
+idna==3.3
     # via requests
-importlib-metadata==4.8.1
+importlib-metadata==4.8.2
     # via alembic
-importlib-resources==5.2.2
+importlib-resources==5.4.0
     # via alembic
-kubernetes==18.20.0
+kubernetes==19.15.0
     # via wiremind-kubernetes
-mako==1.1.5
+mako==1.1.6
     # via alembic
 markupsafe==2.0.1
     # via mako
 oauthlib==3.1.1
     # via requests-oauthlib
-psycopg2==2.9.1
+psycopg2-binary==2.9.2
     # via chartreuse (setup.py)
 pyasn1==0.4.8
     # via
@@ -42,7 +42,7 @@ pyasn1-modules==0.2.8
     # via google-auth
 python-dateutil==2.8.2
     # via kubernetes
-pyyaml==5.4.1
+pyyaml==6.0
     # via kubernetes
 requests==2.26.0
     # via
@@ -54,9 +54,10 @@ rsa==4.7.2
     # via google-auth
 six==1.16.0
     # via
+    #   google-auth
     #   kubernetes
     #   python-dateutil
-sqlalchemy==1.4.25
+sqlalchemy==1.4.27
     # via alembic
 urllib3==1.26.7
     # via
diff --git a/setup.py b/setup.py
index eb697b7..0896f7a 100644
--- a/setup.py
+++ b/setup.py
@@ -42,7 +42,7 @@
     python_requires=">=3.7.0",
     install_requires=[
         "alembic==1.*",
-        "psycopg2==2.*",
+        "psycopg2-binary==2.*",
         "wiremind-kubernetes==6.*,>=6.3.5",
     ],
     extras_require={