diff --git a/docker-compose.ref.yml b/docker-compose.ref.yml
index 2ad8e15c..82fb8c06 100644
--- a/docker-compose.ref.yml
+++ b/docker-compose.ref.yml
@@ -2,7 +2,7 @@ services:
   limesurvey:
     image: edgarrmondragon/limesurvey
     build:
-      context: ${LS_DOCKERFILE_CONTEXT:-https://github.com/martialblog/docker-limesurvey.git#master:5.0/apache}
+      context: ${LS_DOCKERFILE_CONTEXT:-https://github.com/martialblog/docker-limesurvey.git#master:6.0/apache}
       dockerfile: ${LS_DOCKERFILE:-Dockerfile}
       args:
         version: ${LS_VERSION}
diff --git a/docker-compose.yml b/docker-compose.yml
index 77147ca9..c4697656 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -2,7 +2,7 @@ version: '3'
 
 services:
   limesurvey:
-    image: martialblog/limesurvey:${LS_IMAGE_TAG:-5-apache}
+    image: martialblog/limesurvey:${LS_IMAGE_TAG:-6-apache}
     volumes:
       - "surveys:/var/www/html/upload/surveys"
       - "apache:/var/log/apache2"
diff --git a/docs/_ext/limesurvey_future.py b/docs/_ext/limesurvey_future.py
index 12381fd7..6c087d74 100644
--- a/docs/_ext/limesurvey_future.py
+++ b/docs/_ext/limesurvey_future.py
@@ -10,6 +10,8 @@
 if TYPE_CHECKING:
     from sphinx.application import Sphinx
 
+__all__ = ["ReleasedFeature", "UnreleasedFeature", "setup"]
+
 
 class UnreleasedFeature(Directive):
     """A directive for development-only features.
@@ -19,23 +21,31 @@ class UnreleasedFeature(Directive):
     """
 
     required_arguments = 1
+    message = (
+        "This method is only supported in LimeSurvey >= {next_version} "
+        "(currently in development)."
+    )
+    admonition_type = nodes.warning
 
     def run(self) -> list[nodes.Node]:
         next_version = self.arguments[0]
-        admonition_node = nodes.warning(
-            "",
-            nodes.paragraph(
-                text=(
-                    f"This method is only available in LimeSurvey >= {next_version} "
-                    "(currently in development)."
-                ),
-            ),
-        )
-        return [admonition_node]
+        text = self.message.format(next_version=next_version)
+        return [self.admonition_type("", nodes.paragraph(text=text))]
+
+
+class ReleasedFeature(UnreleasedFeature):
+    """A directive for released features.
+
+    Adds a note to features only available after some release of LimeSurvey.
+    """
+
+    message = "This method is only supported in LimeSurvey >= {next_version}."
+    admonition_type = nodes.note
 
 
 def setup(app: Sphinx) -> dict[str, Any]:
     app.add_directive("future", UnreleasedFeature)
+    app.add_directive("minlimesurvey", ReleasedFeature)
 
     return {
         "version": "0.1",
diff --git a/src/citric/client.py b/src/citric/client.py
index 3329f4ad..edb092a4 100644
--- a/src/citric/client.py
+++ b/src/citric/client.py
@@ -12,7 +12,6 @@
 import requests
 
 from citric import enums
-from citric._compat import future
 from citric.session import Session
 
 if TYPE_CHECKING:
@@ -228,7 +227,6 @@ def add_participants(
             create_tokens,
         )
 
-    @future("6.0")
     def add_quota(
         self,
         survey_id: int,
@@ -259,7 +257,7 @@ def add_quota(
             ID of the newly created quota.
 
         .. versionadded:: 0.6.0
-        .. future:: 6.0
+        .. minlimesurvey:: 6.0.0
         """
         return self.session.add_quota(
             survey_id,
@@ -512,7 +510,6 @@ def delete_language(self, survey_id: int, language: str) -> types.OperationStatu
         """
         return self.__session.delete_language(survey_id, language)
 
-    @future("6.0")
     def delete_quota(self, quota_id: int) -> types.OperationStatus:
         """Delete a LimeSurvey quota.
 
@@ -523,7 +520,7 @@ def delete_quota(self, quota_id: int) -> types.OperationStatus:
             True if the quota was deleted.
 
         .. versionadded:: 0.6.0
-        .. future:: 6.0
+        .. minlimesurvey:: 6.0.0
         """
         return self.session.delete_quota(quota_id)
 
@@ -851,7 +848,6 @@ def get_question_properties(
         """
         return self.__session.get_question_properties(question_id, settings, language)
 
-    @future("6.0")
     def get_quota_properties(
         self,
         quota_id: int,
@@ -869,7 +865,7 @@ def get_quota_properties(
             Quota properties.
 
         .. versionadded:: 0.6.0
-        .. future:: 6.0
+        .. minlimesurvey:: 6.0.0
         """
         return self.session.get_quota_properties(quota_id, settings, language)
 
@@ -889,7 +885,6 @@ def get_response_ids(
         """
         return self.__session.get_response_ids(survey_id, token)
 
-    @future("6.0")
     def get_available_site_settings(self) -> list[str]:
         """Get all available site settings.
 
@@ -897,7 +892,8 @@ def get_available_site_settings(self) -> list[str]:
             A list of all the available site settings.
 
         .. versionadded:: 0.6.0
-        .. future:: 6.0
+        .. future: 6.0.0
+        .. minlimesurvey:: 6.0.0
         """
         return self.session.get_available_site_settings()
 
@@ -1216,7 +1212,6 @@ def list_questions(
         """
         return self.__session.list_questions(survey_id, group_id, language)
 
-    @future("6.0")
     def list_quotas(self, survey_id: int) -> list[types.QuotaListElement]:
         """Get all quotas for a LimeSurvey survey.
 
@@ -1227,7 +1222,7 @@ def list_quotas(self, survey_id: int) -> list[types.QuotaListElement]:
             List of quotas.
 
         .. versionadded:: 0.6.0
-        .. future:: 6.0
+        .. minlimesurvey:: 6.0.0
         """
         return self.session.list_quotas(survey_id)
 
diff --git a/tests/test_integration.py b/tests/test_integration.py
index 04e6883a..1d9456f6 100644
--- a/tests/test_integration.py
+++ b/tests/test_integration.py
@@ -202,7 +202,6 @@ def test_question(client: citric.Client, survey_id: int):
 
 
 @pytest.mark.integration_test
-@pytest.mark.version("develop")
 def test_quota(client: citric.Client, survey_id: int):
     """Test quota methods."""
     with pytest.raises(LimeSurveyStatusError, match="No quotas found"):
@@ -488,7 +487,6 @@ def test_file_upload_invalid_extension(
 
 
 @pytest.mark.integration_test
-@pytest.mark.version("develop")
 def test_get_available_site_settings(client: citric.Client):
     """Test getting available site settings."""
     assert client.get_available_site_settings()