diff --git a/src/appveyor.bat b/src/appveyor.bat
index 48a5d3bdc71730..958583ce7ab163 100644
--- a/src/appveyor.bat
+++ b/src/appveyor.bat
@@ -71,7 +71,7 @@ path C:\Perl522\perl\bin;%path%;C:\Lua;C:\Tcl\bin;C:\Ruby22\bin;C:\Program Files
 
 :: Install additional packages for Racket
 raco pkg install scheme-lib
-raco pkg install r5rs-lib
+raco pkg install --auto r5rs-lib
 @echo off
 goto :eof
 
@@ -133,7 +133,7 @@ path C:\Perl522\perl\bin;%path%;C:\Lua;C:\Tcl\bin;C:\Ruby22-x64\bin;C:\Program F
 
 :: Install additional packages for Racket
 raco pkg install scheme-lib
-raco pkg install r5rs-lib
+raco pkg install --auto r5rs-lib
 @echo off
 goto :eof