diff --git a/src/fake_bpy_module/analyzer.py b/src/fake_bpy_module/analyzer.py
index 9a578290..03be0c15 100644
--- a/src/fake_bpy_module/analyzer.py
+++ b/src/fake_bpy_module/analyzer.py
@@ -3,6 +3,7 @@
 import json
 import copy
 
+from . import support
 from .common import (
     BuiltinDataType,
     CustomDataType,
@@ -1142,7 +1143,9 @@ def _analyze_by_file(self, filename: str) -> 'SectionInfo':
         return section_none_removed
 
     def analyze(self, filenames: List[str]) -> 'AnalysisResult':
-        # TODO: Add assertion.
+        assert self.target in support.SUPPORTED_TARGET
+        assert (self.target_version in support.SUPPORTED_BLENDER_VERSION or
+                self.target_version in support.SUPPORTED_UPBGE_VERSION)
 
         result = AnalysisResult()
         for f in filenames: