# Amazon Neptune Engine Version 1.0.4.2 (2021-06-01)
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**Note**  
Engine release version 1.0.4.2.R2 was the first version of 1.0.4.2 actually to be released.

**Topics**
+ [Amazon Neptune Engine Version 1.0.4.2.R5 (2021-08-16)](engine-releases-1.0.4.2.R5.md)
+ [Amazon Neptune Engine Version 1.0.4.2.R4 (2021-07-23)](engine-releases-1.0.4.2.R4.md)
+ [Amazon Neptune Engine Version 1.0.4.2.R3 (2021-06-28)](engine-releases-1.0.4.2.R3.md)
+ [Amazon Neptune Engine Version 1.0.4.2.R2 (2021-06-01)](engine-releases-1.0.4.2.R2.md)
+ [Amazon Neptune Engine Version 1.0.4.2.R1 (2021-05-27)](engine-releases-1.0.4.2.R1.md)