diff --git a/examples/benchmarks/json/cpu.py b/examples/benchmarks/json/cpu.py
index <HASH>..<HASH> 100755
--- a/examples/benchmarks/json/cpu.py
+++ b/examples/benchmarks/json/cpu.py
@@ -44,6 +44,10 @@ except:
         def parse_time(_json_string, _iterations):
             return float('inf')
 
+        @staticmethod
+        def version():
+            return 'unknown'
+
 try:
     from parsers import parsy_json
 except:
@@ -53,6 +57,10 @@ except:
         def parse_time(_json_string, _iterations):
             return float('inf')
 
+        @staticmethod
+        def version():
+            return 'unknown'
+
 try:
     from parsers import pyleri_json
 except:
@@ -62,6 +70,10 @@ except:
         def parse_time(_json_string, _iterations):
             return float('inf')
 
+        @staticmethod
+        def version():
+            return 'unknown'
+
 
 SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__))
 DATA_JSON = os.path.relpath(os.path.join(SCRIPT_DIR, 'data.json'))
Added version to CPU benchmark stubs.