diff --git a/coveralls/api.py b/coveralls/api.py
index f6d54e89..84296eee 100644
--- a/coveralls/api.py
+++ b/coveralls/api.py
@@ -120,9 +120,19 @@ def load_config_from_travis():
 
     @staticmethod
     def load_config_from_semaphore():
-        job = os.environ.get('SEMAPHORE_BUILD_NUMBER')
-        pr = os.environ.get('PULL_REQUEST_NUMBER')
-        return 'semaphore-ci', job, None, pr
+        job = (
+            os.environ.get('SEMAPHORE_JOB_UUID')  # Classic
+            or os.environ.get('SEMAPHORE_JOB_ID')  # 2.0
+        )
+        number = (
+            os.environ.get('SEMAPHORE_EXECUTABLE_UUID')  # Classic
+            or os.environ.get('SEMAPHORE_WORKFLOW_ID')  # 2.0
+        )
+        pr = (
+            os.environ.get('SEMAPHORE_BRANCH_ID')  # Classic
+            or os.environ.get('SEMAPHORE_GIT_PR_NUMBER')  # 2.0
+        )
+        return 'semaphore-ci', job, number, pr
 
     @staticmethod
     def load_config_from_unknown():
diff --git a/docs/usage/tox.rst b/docs/usage/tox.rst
index 14ad07e5..29b7eef0 100644
--- a/docs/usage/tox.rst
+++ b/docs/usage/tox.rst
@@ -102,15 +102,35 @@ All variables:
 
 SemaphoreCI
 -----------
+
+Classic
+~~~~~~~
+
+::
+
+    passenv = SEMAPHORE SEMAPHORE_EXECUTABLE_UUID SEMAPHORE_JOB_UUID SEMAPHORE_BRANCH_ID BRANCH_NAME
+
+All variables:
+
+- ``SEMAPHORE``
+- ``SEMAPHORE_EXECUTABLE_UUID``
+- ``SEMAPHORE_JOB_UUID``
+- ``SEMAPHORE_BRANCH_ID``
+- ``BRANCH_NAME``
+
+2.0
+~~~
+
 ::
 
-    passenv = SEMAPHORE SEMAPHORE_BUILD_NUMBER BRANCH_NAME PULL_REQUEST_NUMBER
+    passenv = SEMAPHORE SEMAPHORE_WORKFLOW_ID SEMAPHORE_JOB_ID SEMAPHORE_GIT_PR_NUMBER BRANCH_NAME
 
 All variables:
 
 - ``SEMAPHORE``
-- ``SEMAPHORE_BUILD_NUMBER``
+- ``SEMAPHORE_WORKFLOW_ID``
+- ``SEMAPHORE_JOB_ID``
+- ``SEMAPHORE_GIT_PR_NUMBER``
 - ``BRANCH_NAME``
-- ``PULL_REQUEST_NUMBER``
 
 .. _tox: https://tox.readthedocs.io/en/latest/
diff --git a/tests/api/configuration_test.py b/tests/api/configuration_test.py
index 985bc925..c2e12acf 100644
--- a/tests/api/configuration_test.py
+++ b/tests/api/configuration_test.py
@@ -170,15 +170,32 @@ def test_travis_no_config(self):
         assert cover.config['service_job_id'] == '777'
         assert 'repo_token' not in cover.config
 
-    @mock.patch.dict(os.environ,
-                     {'SEMAPHORE': 'True',
-                      'SEMAPHORE_BUILD_NUMBER': '888',
-                      'PULL_REQUEST_NUMBER': '9999'},
-                     clear=True)
-    def test_semaphore_no_config(self):
+    @mock.patch.dict(
+        os.environ,
+        {'SEMAPHORE': 'True',
+         'SEMAPHORE_EXECUTABLE_UUID': '36980c73',
+         'SEMAPHORE_JOB_UUID': 'a26d42cf',
+         'SEMAPHORE_BRANCH_ID': '9999'},
+        clear=True)
+    def test_semaphore_classic_no_config(self):
         cover = Coveralls(repo_token='xxx')
         assert cover.config['service_name'] == 'semaphore-ci'
-        assert cover.config['service_job_id'] == '888'
+        assert cover.config['service_job_id'] == 'a26d42cf'
+        assert cover.config['service_number'] == '36980c73'
+        assert cover.config['service_pull_request'] == '9999'
+
+    @mock.patch.dict(
+        os.environ,
+        {'SEMAPHORE': 'True',
+         'SEMAPHORE_WORKFLOW_ID': 'b86b3adf',
+         'SEMAPHORE_JOB_ID': '2b942b49',
+         'SEMAPHORE_GIT_PR_NUMBER': '9999'},
+        clear=True)
+    def test_semaphore_20_no_config(self):
+        cover = Coveralls(repo_token='xxx')
+        assert cover.config['service_name'] == 'semaphore-ci'
+        assert cover.config['service_job_id'] == '2b942b49'
+        assert cover.config['service_number'] == 'b86b3adf'
         assert cover.config['service_pull_request'] == '9999'
 
     @mock.patch.dict(os.environ, {'COVERALLS_SERVICE_NAME': 'xxx'}, clear=True)