diff --git a/bindings/erlang/src/vanillae.erl b/bindings/erlang/src/vanillae.erl
index 70ab4ae..8a1ce46 100644
--- a/bindings/erlang/src/vanillae.erl
+++ b/bindings/erlang/src/vanillae.erl
@@ -1033,14 +1033,18 @@ read_aci(Path) ->
 %% for contract_call/10.
 
 contract_call(CallerID, AACI, ConID, Fun, Args) ->
-    {ok, Nonce} = next_nonce(CallerID),
-    Gas = min_gas(),
-    GasPrice = min_gas_price(),
-    Fee = min_fee(),
-    Amount = 0,
-    contract_call(CallerID, Nonce,
-                  Gas, GasPrice, Fee, Amount,
-                  AACI, ConID, Fun, Args).
+    case next_nonce(CallerID) of
+        {ok, Nonce} ->
+            Gas = min_gas(),
+            GasPrice = min_gas_price(),
+            Fee = min_fee(),
+            Amount = 0,
+            contract_call(CallerID, Nonce,
+                          Gas, GasPrice, Fee, Amount,
+                          AACI, ConID, Fun, Args);
+        Error ->
+            Error
+    end.
 
 
 -spec contract_call(CallerID, Gas, AACI, ConID, Fun, Args) -> Result
@@ -1061,13 +1065,17 @@ contract_call(CallerID, AACI, ConID, Fun, Args) ->
 %% for contract_call/10.
 
 contract_call(CallerID, Gas, AACI, ConID, Fun, Args) ->
-    {ok, Nonce} = next_nonce(CallerID),
-    GasPrice = min_gas_price(),
-    Fee = min_fee(),
-    Amount = 0,
-    contract_call(CallerID, Nonce,
-                  Gas, GasPrice, Fee, Amount,
-                  AACI, ConID, Fun, Args).
+    case next_nonce(CallerID) of
+        {ok, Nonce} ->
+            GasPrice = min_gas_price(),
+            Fee = min_fee(),
+            Amount = 0,
+            contract_call(CallerID, Nonce,
+                          Gas, GasPrice, Fee, Amount,
+                          AACI, ConID, Fun, Args);
+        Error ->
+            Error
+    end.
 
 
 -spec contract_call(CallerID, Nonce,
diff --git a/bindings/erlang/src/vanillae_sup.erl b/bindings/erlang/src/vanillae_sup.erl
new file mode 100644
index 0000000..08aedd2
--- /dev/null
+++ b/bindings/erlang/src/vanillae_sup.erl
@@ -0,0 +1,43 @@
+%%% @doc
+%%% Vanillae Erlang Aeternity application supervisor
+%%%
+%%% The very top level supervisor in the system. It only has one service branch: the
+%%% "vanillae_man" (Vanillae Manager).
+%%%
+%%% See: http://erlang.org/doc/design_principles/applications.html
+%%% See: http://zxq9.com/archives/1311
+%%% @end
+
+-module(vanillae_sup).
+-vsn("0.1.0").
+-behaviour(supervisor).
+-author("Craig Everett <zxq9@zxq9.com>").
+-copyright("Craig Everett <zxq9@zxq9.com>").
+-license("GPL-3.0-or-later").
+
+-export([start_link/0]).
+-export([init/1]).
+
+
+-spec start_link() -> {ok, pid()}.
+%% @private
+%% This supervisor's own start function.
+
+start_link() ->
+  supervisor:start_link({local, ?MODULE}, ?MODULE, []).
+
+
+-spec init([]) -> {ok, {supervisor:sup_flags(), [supervisor:child_spec()]}}.
+%% @private
+%% The OTP init/1 function.
+
+init([]) ->
+    RestartStrategy = {one_for_one, 0, 60},
+    Manager   = {vanillae_man,
+                 {vanillae_man, start_link, []},
+                 permanent,
+                 5000,
+                 worker,
+                 [vanillae_man]},
+    Children  = [Manager],
+    {ok, {RestartStrategy, Children}}.
diff --git a/bindings/erlang/zomp.meta b/bindings/erlang/zomp.meta
index 7f89e08..bb0d37c 100644
--- a/bindings/erlang/zomp.meta
+++ b/bindings/erlang/zomp.meta
@@ -2,12 +2,12 @@
 {author,"Craig Everett"}.
 {c_email,"ceverett@tsuriai.jp"}.
 {copyright,"Craig Everett"}.
-{deps,[{"otpr","aeserialization",{0,1,0}},
-       {"otpr","aesophia",{7,1,0}},
+{deps,[{"otpr","aebytecode",{3,2,1}},
+       {"otpr","aesophia",{7,1,2}},
+       {"otpr","aeserialization",{0,1,0}},
        {"otpr","zj",{1,1,0}},
        {"otpr","eblake2",{1,0,0}},
-       {"otpr","getopt",{1,0,2}},
-       {"otpr","aebytecode",{3,2,0}}]}.
+       {"otpr","getopt",{1,0,2}}]}.
 {desc,"Erlang library for ecommerce use of the Aeternity blockchain"}.
 {file_exts,[]}.
 {key_name,none}.