diff --git a/build.ps1 b/build.ps1
index d9dbe2c8..26511f11 100644
--- a/build.ps1
+++ b/build.ps1
@@ -2,7 +2,7 @@
 # creates NuGet package at \artifacts
 dotnet --version
 
-$versionPrefix = "1.6.0"
+$versionPrefix = "1.5.4"
 $versionSuffix = ""
 $versionFile = $versionPrefix + "." + ${env:APPVEYOR_BUILD_NUMBER}
 $versionProduct = $versionPrefix;