diff --git a/docker/Dockerfile b/docker/Dockerfile
index 530ebf4..5c1b94e 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -27,6 +27,7 @@ RUN apt-get update && apt-get install -y \
         clang-tidy-$CLANG_VERSION \
         nodejs \
         npm \
+        pmccabe \
         enchant-2 && \
     pip3 install gitlint && \
     pip3 install license-expression && \
diff --git a/his_checker.py b/his_checker.py
index 2ec03e9..0a85427 100755
--- a/his_checker.py
+++ b/his_checker.py
@@ -9,9 +9,34 @@
 
 import sys
 import argparse
+import os
+
+CYCLOMATIC_THRESHOLD = 10
+
+def process_complexity(files):
+
+    """Process McCabe Cyclomatic Complexity for each function in a file"""
+
+    metric_fail = 0
+    pmccabe_cc_index = 0
+    function_index = 5
+    cc_tool = "pmccabe -c "
+    print("Checking McCabe Cyclomatic Complexity metric")
+    for file in files.files:
+        sline = os.popen(cc_tool + str(file)).read().split('\n')
+        for fields in [line.split('\t') for line in sline[:-1]]:
+            cyc_cmplx = int(fields[pmccabe_cc_index])
+            if cyc_cmplx > CYCLOMATIC_THRESHOLD:
+                function_name = fields[function_index]
+                print(function_name + " function has a complexity of " +
+                      str(cyc_cmplx) + ". The maximum is " +
+                      str(CYCLOMATIC_THRESHOLD))
+                metric_fail += 1
+    print("Check done with " + str(metric_fail) + " error(s)\n")
+    return metric_fail
 
 if __name__ == "__main__":
-    METRICS_LIST = []
+    METRICS_LIST = [process_complexity]
     CHECK_FAIL = 0
     PARSER = argparse.ArgumentParser()
     PARSER.add_argument("files", nargs="+", help="The files to process")