diff --git a/src/aeser_api_encoder.erl b/src/aeser_api_encoder.erl
index 5e081df..9fc91f8 100644
--- a/src/aeser_api_encoder.erl
+++ b/src/aeser_api_encoder.erl
@@ -24,6 +24,7 @@
                     | contract_pubkey
                     | contract_store_key
                     | contract_store_value
+                    | contract_source
                     | transaction
                     | tx_hash
                     | oracle_pubkey
@@ -171,6 +172,7 @@ id2type(associate_chain) -> associate_chain;
 id2type(channel)         -> channel;
 id2type(commitment)      -> commitment;
 id2type(contract)        -> contract_pubkey;
+id2type(contract_source) -> contract_source;
 id2type(name)            -> name;
 id2type(native_token)    -> native_token;
 id2type(entry)           -> entry;
@@ -181,6 +183,7 @@ type2id(associate_chain) -> associate_chain;
 type2id(channel)         -> channel;
 type2id(commitment)      -> commitment;
 type2id(contract_pubkey) -> contract;
+type2id(contract_source) -> contract_source;
 type2id(name)            -> name;
 type2id(native_token)    -> native_token;
 type2id(entry)           -> entry;
@@ -197,6 +200,7 @@ type2enc(contract_pubkey)      -> ?BASE58;
 type2enc(contract_bytearray)   -> ?BASE64;
 type2enc(contract_store_key)   -> ?BASE64;
 type2enc(contract_store_value) -> ?BASE64;
+type2enc(contract_source)      -> ?BASE64;
 type2enc(transaction)          -> ?BASE64;
 type2enc(tx_hash)              -> ?BASE58;
 type2enc(oracle_pubkey)        -> ?BASE58;
@@ -232,6 +236,7 @@ type2pfx(contract_pubkey)      -> <<"ct">>;
 type2pfx(contract_bytearray)   -> <<"cb">>;
 type2pfx(contract_store_key)   -> <<"ck">>;
 type2pfx(contract_store_value) -> <<"cv">>;
+type2pfx(contract_source)      -> <<"cx">>;
 type2pfx(transaction)          -> <<"tx">>;
 type2pfx(tx_hash)              -> <<"th">>;
 type2pfx(oracle_pubkey)        -> <<"ok">>;
@@ -266,6 +271,7 @@ pfx2type(<<"cb">>) -> contract_bytearray;
 pfx2type(<<"ck">>) -> contract_store_key;
 pfx2type(<<"cv">>) -> contract_store_value;
 pfx2type(<<"ct">>) -> contract_pubkey;
+pfx2type(<<"cx">>) -> contract_source;
 pfx2type(<<"tx">>) -> transaction;
 pfx2type(<<"th">>) -> tx_hash;
 pfx2type(<<"ok">>) -> oracle_pubkey;
@@ -302,6 +308,7 @@ byte_size_for_type(contract_pubkey)      -> 32;
 byte_size_for_type(contract_bytearray)   -> not_applicable;
 byte_size_for_type(contract_store_key)   -> not_applicable;
 byte_size_for_type(contract_store_value) -> not_applicable;
+byte_size_for_type(contract_source)      -> not_applicable;
 byte_size_for_type(transaction)          -> not_applicable;
 byte_size_for_type(tx_hash)              -> 32;
 byte_size_for_type(oracle_pubkey)        -> 32;
diff --git a/src/aeser_chain_objects.erl b/src/aeser_chain_objects.erl
index c974124..48e416e 100644
--- a/src/aeser_chain_objects.erl
+++ b/src/aeser_chain_objects.erl
@@ -58,6 +58,7 @@ tag(contract) -> 40;
 tag(contract_call) -> 41;
 tag(contract_create_tx) -> 42;
 tag(contract_call_tx) -> 43;
+tag(contract_source) -> 44;
 tag(channel_create_tx) -> 50;
 tag(channel_set_delegates_tx) -> 501;
 tag(channel_delegates) -> 502;
@@ -142,6 +143,7 @@ rev_tag(40) -> contract;
 rev_tag(41) -> contract_call;
 rev_tag(42) -> contract_create_tx;
 rev_tag(43) -> contract_call_tx;
+rev_tag(44) -> contract_source;
 rev_tag(50) -> channel_create_tx;
 rev_tag(501) -> channel_set_delegates_tx;
 rev_tag(502) -> channel_delegates;