diff --git a/var/spack/repos/builtin/packages/go/package.py b/var/spack/repos/builtin/packages/go/package.py
index 54b086790e..efe94e03bf 100644
--- a/var/spack/repos/builtin/packages/go/package.py
+++ b/var/spack/repos/builtin/packages/go/package.py
@@ -38,10 +38,12 @@ class Go(Package):
     extendable = True
     executables = ['^go$']
 
+    version('1.16.5', sha256='7bfa7e5908c7cc9e75da5ddf3066d7cbcf3fd9fa51945851325eebc17f50ba80')
     version('1.16.4', sha256='ae4f6b6e2a1677d31817984655a762074b5356da50fb58722b99104870d43503')
     version('1.16.3', sha256='b298d29de9236ca47a023e382313bcc2d2eed31dfa706b60a04103ce83a71a25')
     version('1.16.2', sha256='37ca14287a23cb8ba2ac3f5c3dd8adbc1f7a54b9701a57824bf19a0b271f83ea')
     version('1.16', sha256='7688063d55656105898f323d90a79a39c378d86fe89ae192eb3b7fc46347c95a')
+    version('1.15.13', sha256='99069e7223479cce4553f84f874b9345f6f4045f27cf5089489b546da619a244')
     version('1.15.12', sha256='1c6911937df4a277fa74e7b7efc3d08594498c4c4adc0b6c4ae3566137528091')
     version('1.15.11', sha256='f25b2441d4c76cf63cde94d59bab237cc33e8a2a139040d904c8630f46d061e5')
     version('1.15.8', sha256='540c0ab7781084d124991321ed1458e479982de94454a98afab6acadf38497c2')