diff --git a/src/environments/fancythm/fancythm.dtx b/src/environments/fancythm/fancythm.dtx
index dc840df..98fa61a 100644
--- a/src/environments/fancythm/fancythm.dtx
+++ b/src/environments/fancythm/fancythm.dtx
@@ -64,7 +64,6 @@
 %  \subsection{Dependencies}
 %    \begin{macrocode}
 \RequirePackage{l3keys2e}
-\RequirePackage{groupthm}
 \RequirePackage[default styles]{thmstyle}
 %    \end{macrocode}
 %
@@ -348,6 +347,22 @@
 \clist_new:N \l_@@_group_clist
 %    \end{macrocode}
 % \end{variable}
+%
+% 
+% 
+% \begin{variable}{\g_@@_groupthm_option_clist}
+%		 
+%     
+%
+%    \begin{macrocode}
+\clist_new:N \g_@@_groupthm_option_clist
+%    \end{macrocode}
+% \end{variable}
+% 
+% 
+% 
+% 
+% 
 % 
 %    \subsection{Key interface}
 % 
@@ -362,22 +377,32 @@
 %    \begin{macrocode}
 \keys_define:nn { fancythm }
   {
-    translator        .bool_set:N   = \g_@@_translator_bool        ,
-    translator        .default:n    = { true }                            ,
-    generate defaults .bool_set:N   = \g_@@_generate_defaults_bool ,
-    generate defaults .default:n    = { true }                            ,
+    translator        .bool_set:N   = \g_@@_translator_bool           ,
+    translator        .default:n    = { true }                               ,
+    generate defaults .bool_set:N   = \g_@@_generate_defaults_bool    ,
+    generate defaults .default:n    = { true }                               ,
     number in         .choices:nn   =
       { document, section, subsection, chapter, part }
       {
         \counter_alias:nx { toplevel } { in \tl_use:N \l_keys_choice_tl }
-      }                                                                   ,
-    number in         .default:n    = { document }                        ,
+      }                                                                      ,
+    number in         .default:n    = { document }                           ,
     style             .choices:nn   =
       { fancy, plain, classic }
       { 
         \str_set:Nn \g_@@_style_str { \tl_use:N \l_keys_choice_tl }
-      }                                                                   ,
-    style             .default:n    = { fancy }                           ,
+      }                                                                      ,
+    style             .default:n    = { fancy }                              ,
+    cache             .code:n       =
+      {
+        \clist_put_right:Nn \g_@@_groupthm_option_clist { cache = #1 }
+      }                                                                      ,
+    cache             .default:n    = { true }                               ,
+    cache version     .code:n       =
+      {
+        \clist_put_right:Nn \g_@@_groupthm_option_clist { cache version = #1 }
+      }                                                                      ,
+    cache version     .default:n    = { 0 }                                  ,
   }
 %    \end{macrocode}
 % 
@@ -408,6 +433,26 @@
 \ProcessKeysOptions{ fancythm }
 %    \end{macrocode}
 % 
+
+
+% \begin{macro}{\@@_require_package:nn}
+%     
+%
+%    \begin{macrocode}
+\cs_new:Npn \@@_require_package:nn #1
+  {
+    \RequirePackage [ #1 ]
+  }
+\cs_generate_variant:Nn \@@_require_package:nn { V n }
+%    \end{macrocode}
+% \end{macro}
+% 
+% 
+% 
+% 
+%    \begin{macrocode}
+\@@_require_package:Vn \g_@@_groupthm_option_clist { groupthm }
+%    \end{macrocode}
 % 
 % 
 %