diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1fbeaddb..648d07db 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -196,14 +196,19 @@ if (WANT_PYTHON)
 				message(FATAL_ERROR "Invalid value of WANT_PYTHON_VERSION")
 			endif()
 		endif()
-		# Compatibility with pkg-config variables
-		set(Python3_LDFLAGS "${Python3_LIBRARIES}")
+		if (Python3_FOUND AND Python3_VERSION VERSION_LESS 3.3)
+			message(STATUS "Python too old, need at least 3.3")
+			set(Python3_FOUND OFF)
+		else()
+			# Compatibility with pkg-config variables
+			set(Python3_LDFLAGS "${Python3_LIBRARIES}")
+		endif()
 	endif()
 	if (NOT Python3_FOUND AND WANT_PYTHON_VERSION MATCHES "^python")
 		# Since python 3.8, -embed is required for embedding.
-		pkg_check_modules(Python3 "${WANT_PYTHON_VERSION}-embed >= 3.0")
+		pkg_check_modules(Python3 "${WANT_PYTHON_VERSION}-embed >= 3.3")
 		if (NOT Python3_FOUND)
-			pkg_check_modules(Python3 "${WANT_PYTHON_VERSION} >= 3.0")
+			pkg_check_modules(Python3 "${WANT_PYTHON_VERSION} >= 3.3")
 		endif()
 	endif()
 	if (NOT Python3_FOUND)
diff --git a/README.md b/README.md
index 6ab52284..82f3f3b9 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ modperl:
 * SWIG if building from git
 
 modpython:
-* python3 and its bundled libpython
+* python 3.3+ and its bundled libpython
 * perl is a build dependency
 * macOS: Python from Homebrew is preferred over system version
 * SWIG if building from git
diff --git a/configure.ac b/configure.ac
index 3298f04e..2dd5b1d3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -570,8 +570,8 @@ if test "x$PYTHON" != "xno"; then
 	if test -z "$PKG_CONFIG"; then
 		AC_MSG_ERROR([pkg-config is required for modpython.])
 	fi
-	PKG_CHECK_MODULES([python], [$PYTHON-embed >= 3.0],, [
-		PKG_CHECK_MODULES([python], [$PYTHON >= 3.0],, AC_MSG_ERROR([$PYTHON.pc not found or is wrong. Try --disable-python or install python3.]))
+	PKG_CHECK_MODULES([python], [$PYTHON-embed >= 3.3],, [
+		PKG_CHECK_MODULES([python], [$PYTHON >= 3.3],, AC_MSG_ERROR([$PYTHON.pc not found or is wrong. Try --disable-python or install python3.]))
 	])
 	my_saved_LIBS="$LIBS"
 	my_saved_CXXFLAGS="$CXXFLAGS"
diff --git a/modules/modpython/znc.py b/modules/modpython/znc.py
index e664367f..478c5a39 100644
--- a/modules/modpython/znc.py
+++ b/modules/modpython/znc.py
@@ -25,7 +25,7 @@ from functools import wraps
 import imp
 import re
 import traceback
-import collections
+import collections.abc
 
 from znc_core import *
 
@@ -125,7 +125,7 @@ class Timer:
         pass
 
 
-class ModuleNVIter(collections.Iterator):
+class ModuleNVIter(collections.abc.Iterator):
     def __init__(self, cmod):
         self._cmod = cmod
         self.it = cmod.BeginNV_()
@@ -138,7 +138,7 @@ class ModuleNVIter(collections.Iterator):
         return res
 
 
-class ModuleNV(collections.MutableMapping):
+class ModuleNV(collections.abc.MutableMapping):
     def __init__(self, cmod):
         self._cmod = cmod
 
@@ -957,7 +957,7 @@ CModule.AddSocket = FreeOwnership(func=CModule.AddSocket)
 CModule.AddSubPage = FreeOwnership(func=CModule.AddSubPage)
 
 
-class ModulesIter(collections.Iterator):
+class ModulesIter(collections.abc.Iterator):
     def __init__(self, cmod):
         self._cmod = cmod