diff --git a/C/README.md b/C/README.md
index 5281951b..85265768 100644
--- a/C/README.md
+++ b/C/README.md
@@ -41,4 +41,5 @@
 | Program-37 | Program to find the fibonacci sequnce using recursion |
 | Program-38 | Program to find the factorial of a number using recursion |
 | Program-39 | Program to find the GCD of a number using recursion |
+| Program-40 | Program to find the ackerman of given two numbers|