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diff --git a/README.md b/README.md
index 30084ac..d72cdc8 100644
--- a/README.md
+++ b/README.md
@@ -83,3 +83,5 @@ real    67m23.690s
 user    3047m42.788s
 sys     870m1.228s
 ```
+
+Thre is also an OpenCL version of this process which can be found at https://github.com/JJJollyjim/entrust-2fa-opencl, which can be further optimised if desired.