diff --git a/RELEASE.md b/RELEASE.md
index 7ac3259665b5a03bfa967e94dba8f2c85fce72fb..e104c6842a3094e832eb23eb9b8511471a64ed0b 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -12,3 +12,6 @@ v0.7.0 (2018-05-18)
 2. Improve cpu performace
 3. Merge cpu/gpu engine to one
 
+v0.6.3 (2018-05-21)
+------
+1. support `float` data_type when running in gpu
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