diff --git a/rebar.config b/rebar.config
index 10b4612e..979af9a6 100644
--- a/rebar.config
+++ b/rebar.config
@@ -1,4 +1,6 @@
 %%-*- mode: erlang -*-
+{minimum_otp_vsn, "22.0"}.
+
 {eunit_opts, [verbose]}.
 {so_name, "eleveldb.so"}.
 
diff --git a/rebar3 b/rebar3
index e550663a..a83d554a 100755
Binary files a/rebar3 and b/rebar3 differ
diff --git a/src/eleveldb.app.src b/src/eleveldb.app.src
index e74d56da..1139c0eb 100644
--- a/src/eleveldb.app.src
+++ b/src/eleveldb.app.src
@@ -5,7 +5,8 @@
   {registered, []},
   {applications, [
                   kernel,
-                  stdlib
+                  stdlib,
+                  os_mon
                  ]},
   {env, [
          %% what percent of total memory should go to