diff --git a/.travis.yml b/.travis.yml
index 10861956..8f140728 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -33,24 +33,24 @@ jobs:
       env: TOXENV=py38-conancurrent
       dist: xenial
 
-    - stage: Linux - Conan 1.21
+    - stage: Linux - Conan 1.23
       name: Python 3.5
       python: 3.5
-      env: TOXENV=py35-conan121
+      env: TOXENV=py35-conan123
       dist: xenial
     - name: Python 3.8
       python: 3.8
-      env: TOXENV=py38-conan121
+      env: TOXENV=py38-conan123
       dist: xenial
 
-    - stage: Linux - Conan 1.20
+    - stage: Linux - Conan 1.22
       name: Python 3.5
       python: 3.5
-      env: TOXENV=py35-conan120
+      env: TOXENV=py35-conan122
       dist: xenial
     - name: Python 3.8
       python: 3.8
-      env: TOXENV=py38-conan120
+      env: TOXENV=py38-conan122
       dist: xenial
 
     # Macos is slow, only if everything has passed
diff --git a/appveyor.yml b/appveyor.yml
index f87d9413..a91e7c5b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -20,13 +20,13 @@ environment:
         - PYVER: py38
           TOXENV: py38-conancurrent
 
-        # Conan 1.21.x
+        # Conan 1.23.x
         - PYVER: py38
-          TOXENV: py38-conan121
+          TOXENV: py38-conan123
 
-        # Conan 1.20.x
+        # Conan 1.22.x
         - PYVER: py38
-          TOXENV: py38-conan120
+          TOXENV: py38-conan122
 
 install:
   - set PATH=%PATH%;%PYTHON%/Scripts/
diff --git a/hooks/conan-center.py b/hooks/conan-center.py
index de7af7c8..d5041369 100644
--- a/hooks/conan-center.py
+++ b/hooks/conan-center.py
@@ -43,6 +43,7 @@
              "KB-H034": "TEST PACKAGE - NO IMPORTS()",
              "KB-H037": "NO AUTHOR",
              "KB-H040": "NO TARGET NAME",
+             "KB-H044": "NO REQUIRES.ADD()",
             }
 
 
@@ -384,6 +385,14 @@ def test(out):
                           "Conanfile should not contain 'self.cpp_info.names['{0}']'. "
                           " Use 'cmake_find_package' and 'cmake_find_package_multi' instead.".format(generator))
 
+    @run_test("KB-H044", output)
+    def test(out):
+        for forbidden in ["self.requires.add", "self.build_requires.add"]:
+            if forbidden in conanfile_content:
+                out.error("The method '{}()' is not allowed. Use '{}()' instead."
+                          .format(forbidden, forbidden.replace(".add", "")))
+
+
 @raise_if_error_output
 def post_export(output, conanfile, conanfile_path, reference, **kwargs):
     export_folder_path = os.path.dirname(conanfile_path)
diff --git a/tests/test_hooks/conan-center/test_conan-center.py b/tests/test_hooks/conan-center/test_conan-center.py
index 7943a424..d8330f6d 100644
--- a/tests/test_hooks/conan-center/test_conan-center.py
+++ b/tests/test_hooks/conan-center/test_conan-center.py
@@ -541,6 +541,54 @@ def test(self):
         self.assertIn("ERROR: [TEST PACKAGE - NO IMPORTS() (KB-H034)] The method `imports` is not " \
                       "allowed in test_package/conanfile.py", output)
 
+    def test_requirements_add(self):
+        conanfile = textwrap.dedent("""\
+        from conans import ConanFile
+        class AConan(ConanFile):
+                pass
+        """)
+        tools.save('conanfile.py', content=conanfile)
+        output = self.conan(['create', '.', 'name/version@user/test'])
+        self.assertIn("[NO REQUIRES.ADD() (KB-H044)] OK", output)
+
+        conanfile = textwrap.dedent("""\
+        from conans import ConanFile
+        class AConan(ConanFile):
+                def requirements(self):
+                    {}
+        """)
+
+        tools.save('conanfile.py',
+                   content=conanfile.replace("{}", 'self.requires("name/version@user/test")'))
+        output = self.conan(['create', '.', 'foo/version@user/test'])
+        self.assertIn("[NO REQUIRES.ADD() (KB-H044)] OK", output)
+
+        tools.save('conanfile.py',
+                   content=conanfile.replace("{}", 'self.requires.add("name/version@user/test")'))
+        output = self.conan(['create', '.', 'foo/version@user/test'])
+        self.assertIn("[NO REQUIRES.ADD() (KB-H044)] The method 'self.requires.add()' is not " \
+                      "allowed. Use 'self.requires()' instead.", output)
+
+        conanfile = textwrap.dedent("""\
+        from conans import ConanFile
+        class AConan(ConanFile):
+                def build_requirements(self):
+                    {}
+        """)
+
+        tools.save('conanfile.py',
+                   content=conanfile.replace("{}", 'self.build_requires("name/version@user/test")'))
+        output = self.conan(['create', '.', 'foo/version@user/test'])
+        self.assertIn("[NO REQUIRES.ADD() (KB-H044)] OK", output)
+
+        # Conan >= 1.23 requires "context" parameter for build_requires.add()
+        if Version(conan_version) < "1.23":
+            tools.save('conanfile.py',
+                    content=conanfile.replace("{}", 'self.build_requires.add("name/version@user/test")'))
+            output = self.conan(['create', '.', 'foo/version@user/test'])
+            self.assertIn("[NO REQUIRES.ADD() (KB-H044)] The method 'self.build_requires.add()' is not " \
+                        "allowed. Use 'self.build_requires()' instead.", output)
+
     def test_no_author(self):
         conanfile = textwrap.dedent("""\
         from conans import ConanFile
diff --git a/tox.ini b/tox.ini
index d6e982c2..f94bdb87 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,14 +1,14 @@
 [tox]
 skipsdist=True
 envlist =
-    py{27,35,37,38}-conan{dev,latest,120,121}
+    py{27,35,37,38}-conan{dev,latest,122,123}
 
 [testenv]
 deps =
     conandev: https://github.com/conan-io/conan/archive/develop.tar.gz
     conancurrent: conan
-    conan121: conan>=1.21,<1.22
-    conan120: conan>=1.20,<1.21
+    conan123: conan>=1.23,<1.24
+    conan122: conan>=1.22,<1.23
     coverage: coverage-enable-subprocess
     -r {toxinidir}/tests/requirements_test.txt