diff --git a/rebar.config b/rebar.config
index e5ca552..194fe6f 100644
--- a/rebar.config
+++ b/rebar.config
@@ -15,7 +15,7 @@
             {base_plt_apps, [erts, kernel, stdlib, crypto, mnesia]}
            ]}.
 
-{relx, [{release, {aesophia, "4.0.0"},
+{relx, [{release, {aesophia, "4.1.0-rc1"},
          [aesophia, aebytecode, getopt]},
 
         {dev_mode, true},
diff --git a/src/aesophia.app.src b/src/aesophia.app.src
index d22866c..7efc2aa 100644
--- a/src/aesophia.app.src
+++ b/src/aesophia.app.src
@@ -1,6 +1,6 @@
 {application, aesophia,
  [{description, "Contract Language for aeternity"},
-  {vsn, "4.0.0"},
+  {vsn, "4.1.0-rc1"},
   {registered, []},
   {applications,
    [kernel,