diff --git a/gmhc_config-testnet-local.eterm b/gmhc_config-testnet-local.eterm
index e2c0fa0..849f904 100644
--- a/gmhc_config-testnet-local.eterm
+++ b/gmhc_config-testnet-local.eterm
@@ -3,9 +3,9 @@
  , pool => #{id => <<"ct_26xqeE3YKmZV8jrks57JSgZRCHSuG4RGzpnvdz6AAiSSTVbJRM">>,
              host => <<"127.0.0.1">>}
  , workers =>
-       [#{executable => <<"mean15-generic">>, <<"executable_group">> => <<"cpu">>}
-       ,#{executable => <<"mean15-generic">>, <<"executable_group">> => <<"cpu">>}
-       ,#{executable => <<"mean15-generic">>, <<"executable_group">> => <<"cpu">>}
-       ,#{executable => <<"mean15-generic">>, <<"executable_group">> => <<"cpu">>}
+       [#{executable => <<"mean15-generic">>}
+       ,#{executable => <<"mean15-generic">>}
+       ,#{executable => <<"mean15-generic">>}
+       ,#{executable => <<"mean15-generic">>}
        ]
  }.
diff --git a/src/gmhc_config_schema.erl b/src/gmhc_config_schema.erl
index 9a6bbc1..6783b2d 100644
--- a/src/gmhc_config_schema.erl
+++ b/src/gmhc_config_schema.erl
@@ -65,8 +65,7 @@ pool_admin() ->
 
 workers() ->
     array(
-      #{default => [#{executable => <<"mean29-generic">>,
-                      executable_group => <<"cpu">>}],
+      #{default => [#{executable => <<"mean29-generic">>}],
         description =>
             <<"Definitions of workers' configurations. If no worker are configured one worker "
               "is used as default, i.e. 'mean29-generic' executable without any extra args.">>},
@@ -81,10 +80,6 @@ workers() ->
                             "\"lean29-generic\" (CPU-intensive, useful if memory-constrained), "
                             "\"lean29-avx2\" (CPU-intensive, useful if memory-constrained, benefits "
                             "from faster CPU supporting AVX2 instructions).">>}),
-            executable_group =>
-                str(#{description => <<"Group of executable binaries of the worker.">>,
-                      enum => [ <<"cpu">>, <<"cuda">> ],
-                      default => <<"cpu">>}),
             extra_args =>
                 str(#{description => <<"Extra arguments to pass to the worker executable binary. "
                                        "The safest choice is specifying no arguments i.e. empty string.">>,
diff --git a/src/gmhc_workers.erl b/src/gmhc_workers.erl
index faf7612..d6971df 100644
--- a/src/gmhc_workers.erl
+++ b/src/gmhc_workers.erl
@@ -16,7 +16,7 @@
 
 -include_lib("kernel/include/logger.hrl").
 
--define(DEFAULT_EXECUTABLE_GROUP   , <<"cpu">>).
+-define(DEFAULT_EXECUTABLE_GROUP   , <<"gmhive">>).
 -define(DEFAULT_EXTRA_ARGS         , <<>>).
 -define(DEFAULT_HEX_ENCODED_HEADER , false).
 -define(DEFAULT_REPEATS            , 1).
@@ -55,7 +55,7 @@ generate_from_hash(Hash, Target, Nonce, Config, WorkerInstance) ->
 
 build_worker_config(Config) when is_map(Config) ->
     Exec      = maps:get(<<"executable">>, Config),
-    ExecGroup = maps:get(<<"executable_group">>, Config, ?DEFAULT_EXECUTABLE_GROUP),
+    ExecGroup = ?DEFAULT_EXECUTABLE_GROUP,
     ExtraArgs = maps:get(<<"extra_args">>, Config, ?DEFAULT_EXTRA_ARGS),
     HexEncHdr = maps:get(<<"hex_encoded_header">>, Config,
                          hex_encoding_default(ExecGroup, Exec)),