diff --git a/dev/appveyor-install-dependencies.ps1 b/dev/appveyor-install-dependencies.ps1
index 1c34f1bbc1aa3..cf82389173048 100644
--- a/dev/appveyor-install-dependencies.ps1
+++ b/dev/appveyor-install-dependencies.ps1
@@ -114,7 +114,7 @@ $env:Path += ";$env:HADOOP_HOME\bin"
 Pop-Location
 
 # ========================== R
-$rVer = "3.3.1"
+$rVer = "3.4.1"
 $rToolsVer = "3.4.0"
 
 InstallR