diff --git a/acme/setup.py b/acme/setup.py
index 7977ed72c..0b607d7b3 100644
--- a/acme/setup.py
+++ b/acme/setup.py
@@ -3,7 +3,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     'cryptography>=43.0.0',
diff --git a/certbot-apache/setup.py b/certbot-apache/setup.py
index ddd1d2b23..7379188d3 100644
--- a/certbot-apache/setup.py
+++ b/certbot-apache/setup.py
@@ -1,7 +1,7 @@
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     # We specify the minimum acme and certbot version as the current plugin
diff --git a/certbot-compatibility-test/setup.py b/certbot-compatibility-test/setup.py
index 3cc9b5916..c0d72a0d7 100644
--- a/certbot-compatibility-test/setup.py
+++ b/certbot-compatibility-test/setup.py
@@ -1,7 +1,7 @@
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     'certbot',
diff --git a/certbot-dns-cloudflare/setup.py b/certbot-dns-cloudflare/setup.py
index 19a49e51e..107f1462a 100644
--- a/certbot-dns-cloudflare/setup.py
+++ b/certbot-dns-cloudflare/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     # for now, do not upgrade to cloudflare>=2.20 to avoid deprecation warnings and the breaking
diff --git a/certbot-dns-digitalocean/setup.py b/certbot-dns-digitalocean/setup.py
index 010c23671..91a339414 100644
--- a/certbot-dns-digitalocean/setup.py
+++ b/certbot-dns-digitalocean/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     'python-digitalocean>=1.11', # 1.15.0 or newer is recommended for TTL support
diff --git a/certbot-dns-dnsimple/setup.py b/certbot-dns-dnsimple/setup.py
index 6133f91de..5a2eb46f0 100644
--- a/certbot-dns-dnsimple/setup.py
+++ b/certbot-dns-dnsimple/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     # This version of lexicon is required to address the problem described in
diff --git a/certbot-dns-dnsmadeeasy/setup.py b/certbot-dns-dnsmadeeasy/setup.py
index 99f129966..9981287de 100644
--- a/certbot-dns-dnsmadeeasy/setup.py
+++ b/certbot-dns-dnsmadeeasy/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     'dns-lexicon>=3.14.1',
diff --git a/certbot-dns-gehirn/setup.py b/certbot-dns-gehirn/setup.py
index 49fce139e..bab094a05 100644
--- a/certbot-dns-gehirn/setup.py
+++ b/certbot-dns-gehirn/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     'dns-lexicon>=3.14.1',
diff --git a/certbot-dns-google/setup.py b/certbot-dns-google/setup.py
index 64e19b401..c95a284e6 100644
--- a/certbot-dns-google/setup.py
+++ b/certbot-dns-google/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     'google-api-python-client>=1.6.5',
diff --git a/certbot-dns-linode/setup.py b/certbot-dns-linode/setup.py
index 002b52d85..ef4e71058 100644
--- a/certbot-dns-linode/setup.py
+++ b/certbot-dns-linode/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     'dns-lexicon>=3.14.1',
diff --git a/certbot-dns-luadns/setup.py b/certbot-dns-luadns/setup.py
index 1b446af80..32c0a5c95 100644
--- a/certbot-dns-luadns/setup.py
+++ b/certbot-dns-luadns/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     'dns-lexicon>=3.14.1',
diff --git a/certbot-dns-nsone/setup.py b/certbot-dns-nsone/setup.py
index 048fc8147..9e1626742 100644
--- a/certbot-dns-nsone/setup.py
+++ b/certbot-dns-nsone/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     'dns-lexicon>=3.14.1',
diff --git a/certbot-dns-ovh/setup.py b/certbot-dns-ovh/setup.py
index 593fc2d65..acf4f3de6 100644
--- a/certbot-dns-ovh/setup.py
+++ b/certbot-dns-ovh/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     'dns-lexicon>=3.15.1',
diff --git a/certbot-dns-rfc2136/setup.py b/certbot-dns-rfc2136/setup.py
index 94eb5daa7..dbd7142e7 100644
--- a/certbot-dns-rfc2136/setup.py
+++ b/certbot-dns-rfc2136/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     # This version was chosen because it is the version packaged in RHEL 9 and Debian unstable. It
diff --git a/certbot-dns-route53/setup.py b/certbot-dns-route53/setup.py
index 04b7606b9..b70b994c9 100644
--- a/certbot-dns-route53/setup.py
+++ b/certbot-dns-route53/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     'boto3>=1.15.15',
diff --git a/certbot-dns-sakuracloud/setup.py b/certbot-dns-sakuracloud/setup.py
index 9c53c8ec6..84ee6648b 100644
--- a/certbot-dns-sakuracloud/setup.py
+++ b/certbot-dns-sakuracloud/setup.py
@@ -4,7 +4,7 @@ import sys
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     'dns-lexicon>=3.14.1',
diff --git a/certbot-nginx/setup.py b/certbot-nginx/setup.py
index 689a147fe..37e25a37b 100644
--- a/certbot-nginx/setup.py
+++ b/certbot-nginx/setup.py
@@ -1,7 +1,7 @@
 from setuptools import find_packages
 from setuptools import setup
 
-version = '3.3.0.dev0'
+version = '4.0.0.dev0'
 
 install_requires = [
     # We specify the minimum acme and certbot version as the current plugin
diff --git a/certbot/certbot/__init__.py b/certbot/certbot/__init__.py
index da2a1e5f6..9ae7f28ce 100644
--- a/certbot/certbot/__init__.py
+++ b/certbot/certbot/__init__.py
@@ -1,4 +1,4 @@
 """Certbot client."""
 
 # version number like 1.2.3a0, must have at least 2 parts, like 1.2
-__version__ = '3.3.0.dev0'
+__version__ = '4.0.0.dev0'