diff --git a/README.md b/README.md
index 9c33cc4..9b29325 100644
--- a/README.md
+++ b/README.md
@@ -113,6 +113,15 @@ $ gops memstats (<pid>|<addr>)
 If you want to force run garbage collection on the target program, run `gc`.
 It will block until the GC is completed.
 
+#### $gops setgc (\<pid\>|\<addr\>) <perc>
+
+Sets the garbage collection target to a certain percentage.
+The following command sets it to 10%:
+
+``` sh
+$ gops setgc (<pid>|<addr>) 10
+```
+
 
 #### $ gops version (\<pid\>|\<addr\>)