diff --git a/tests/conftest.py b/tests/conftest.py
index 6d0b361..10ba979 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -121,7 +121,7 @@ def test_case_template(thehive: TheHiveApi) -> OutputCaseTemplate:
         case_template={
             "name": name,
             "description": "...",
-            "tags": ["whatever"],
+            "tags": ["template-tag"],
         }
     )
 
@@ -129,8 +129,16 @@ def test_case_template(thehive: TheHiveApi) -> OutputCaseTemplate:
 @pytest.fixture
 def test_case_templates(thehive: TheHiveApi) -> List[OutputCaseTemplate]:
     case_templates: List[InputCaseTemplate] = [
-        {"name": "my first case template", "description": "..."},
-        {"name": "my second case template", "description": "..."},
+        {
+            "name": "my first case template",
+            "description": "...",
+            "tags": ["template-tag-1"],
+        },
+        {
+            "name": "my second case template",
+            "description": "...",
+            "tags": ["template-tag-2"],
+        },
     ]
     return [
         thehive.case_template.create(case_template=case_template)
diff --git a/tests/test_case_endpoint.py b/tests/test_case_endpoint.py
index 29ac1d1..9685db6 100644
--- a/tests/test_case_endpoint.py
+++ b/tests/test_case_endpoint.py
@@ -16,6 +16,7 @@
     InputUpdateCase,
     OutputCase,
 )
+from thehive4py.types.case_template import OutputCaseTemplate
 from thehive4py.types.observable import InputObservable
 from thehive4py.types.page import InputUpdateCasePage, OutputCasePage
 from thehive4py.types.share import InputShare
@@ -168,6 +169,37 @@ def test_get_timeline(self, thehive: TheHiveApi, test_case: OutputCase):
         timeline = thehive.case.get_timeline(case_id=test_case["_id"])
         assert timeline["events"]
 
+    def test_apply_case_template(
+        self,
+        thehive: TheHiveApi,
+        test_case: OutputCase,
+        test_case_template: OutputCaseTemplate,
+    ):
+
+        assert (
+            set(test_case_template.get("tags", [])).issubset(
+                set(test_case.get("tags", []))
+            )
+            is False
+        )
+
+        thehive.case.apply_case_template(
+            fields={
+                "ids": [test_case["_id"]],
+                "caseTemplate": test_case_template["name"],
+                "updateTags": True,
+            }
+        )
+
+        updated_case = thehive.case.get(case_id=test_case["_id"])
+
+        assert (
+            set(test_case_template.get("tags", [])).issubset(
+                set(updated_case.get("tags", []))
+            )
+            is True
+        )
+
     def test_add_and_download_attachment(
         self, thehive: TheHiveApi, test_case: OutputCase, tmp_path: Path
     ):
diff --git a/thehive4py/endpoints/case.py b/thehive4py/endpoints/case.py
index e85ce26..71ca40a 100644
--- a/thehive4py/endpoints/case.py
+++ b/thehive4py/endpoints/case.py
@@ -13,6 +13,7 @@
     CaseStatus,
     CaseStatusValue,
     ImpactStatusValue,
+    InputApplyCaseTemplate,
     InputBulkUpdateCase,
     InputCase,
     InputImportCase,
@@ -113,6 +114,11 @@ def export_to_file(self, case_id: CaseId, password: str, export_path: str) -> No
     def get_timeline(self, case_id: CaseId) -> OutputTimeline:
         return self._session.make_request("GET", f"/api/v1/case/{case_id}/timeline")
 
+    def apply_case_template(self, fields: InputApplyCaseTemplate) -> None:
+        return self._session.make_request(
+            "POST", "/api/v1/case/_bulk/caseTemplate", json=fields
+        )
+
     def add_attachment(
         self, case_id: CaseId, attachment_paths: List[str]
     ) -> List[OutputAttachment]:
diff --git a/thehive4py/types/case.py b/thehive4py/types/case.py
index b2a0608..2d7ff88 100644
--- a/thehive4py/types/case.py
+++ b/thehive4py/types/case.py
@@ -140,3 +140,21 @@ class InputImportCase(InputImportCaseRequired, total=False):
     sharingParameters: List[InputShare]
     taskRule: str
     observableRule: str
+
+
+class InputApplyCaseTemplateRequired(TypedDict):
+    ids: List[str]
+    caseTemplate: str
+
+
+class InputApplyCaseTemplate(InputApplyCaseTemplateRequired, total=False):
+    updateTitlePrefix: bool
+    updateDescription: bool
+    updateTags: bool
+    updateSeverity: bool
+    updateFlag: bool
+    updateTlp: bool
+    updatePap: bool
+    updateCustomFields: bool
+    importTasks: List[str]
+    importPages: List[str]