diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 9829c31f9..df497c1d2 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -179,3 +179,4 @@ In chronological order:
   * [2019-11-12] AVX512 CGEMM & ZGEMM kernels
   * [2019-12-23] optimize AVX2 CGEMM and ZGEMM
   * [2019-12-30] AVX2 CGEMM3M & ZGEMM3M kernels
+  * [2020-01-07] optimize AVX2 SGEMM and STRMM