diff --git a/build_info.json b/build_info.json
index d9bf7fa..c7f13d0 100644
--- a/build_info.json
+++ b/build_info.json
@@ -1,8 +1,8 @@
 {
     "build_time": "",
     "source files": {
-        "version": "v2.2.2-7",
-        "commit": "dd60e7cba7a0693313d9248ddf87c5244912822a",
+        "version": "v2.2.2-8",
+        "commit": "5a7525ffa42840583a06447de29322f8cc77318f",
         "dirty": false
     },
     "pytex": {
@@ -174,9 +174,9 @@
         {
             "name": "mkessler-faktor.sty",
             "source file": "faktor.pysty",
-            "build time": "2021/10/24 08:36",
-            "source version": "v2.2.2-2",
-            "source commit hash": "0e520739a3ac07d81f5d9dba14a955a4b05d1851",
+            "build time": "2021/10/24 19:12",
+            "source version": "v2.2.2-8",
+            "source commit hash": "5a7525ffa42840583a06447de29322f8cc77318f",
             "pytex version": "v1.0.0-18",
             "pytex commit hash": "126d420b7a6ed2d4b2a42d534ab2e12344869643",
             "dirty": false
diff --git a/math/mkessler-faktor.sty b/math/mkessler-faktor.sty
index 97cc2ed..7cf5891 100644
--- a/math/mkessler-faktor.sty
+++ b/math/mkessler-faktor.sty
@@ -27,7 +27,7 @@
 % 
 % Build details:
 %   PyTeX version: v1.0.0-18 (commit 126d420)
-%   Source code version: v2.2.2-2 (commit 0e52073)
+%   Source code version: v2.2.2-8 (commit 5a7525f)
 % 
 % This LaTeX package is free software and distributed under the MIT License. You
 % may use it freely for your purposes. The latest version of the package can be
@@ -61,26 +61,26 @@
 \RequirePackage{mathtools}
 
 
-\DeclareDocumentCommand{\faktor}{s m O{0.5} m O{-0.5}}{% \newfaktor[*]{#2}[#3]{#4}[#5] -> #2/#4
-  \setbox0=\hbox{\ensuremath{#2}}% Store numerator
+\DeclareDocumentCommand{\faktor}{s O{0.5} m O{-0.5} m}{% \newfaktor[*][#2]{#3}[#4]{#5} -> #3/#5
+  \setbox0=\hbox{\ensuremath{#3}}% Store numerator
   \setbox1=\hbox{\ensuremath{\diagup}}% Store slash /
-  \setbox2=\hbox{\ensuremath{#4}}% Store denominator
-  \raisebox{#3\ht1}{\usebox0}% Numerator
+  \setbox2=\hbox{\ensuremath{#5}}% Store denominator
+  \raisebox{#2\ht1}{\usebox0}% Numerator
   \mkern-5mu\ifthenelse{\equal{#1}{\BooleanTrue}}% Slash /
     {\diagup}% regular \faktor slash
-    {\rotatebox{-44}{\rule[#5\ht2]{0.4pt}{-#5\ht2+#3\ht0+\ht0}}}% tilted rule as a slash
+    {\rotatebox{-44}{\rule[#4\ht2]{0.4pt}{-#4\ht2+#2\ht0+\ht0}}}% tilted rule as a slash
   \mkern-4mu%
-  \raisebox{#5\ht2}{\usebox2}% Denominator
+  \raisebox{#4\ht2}{\usebox2}% Denominator
 }
 
-\DeclareDocumentCommand{\cofaktor}{s m O{-0.5} m O{0.5}}{% \newfaktor[*]{#2}[#3]{#4}[#5] -> #2/#4
-  \setbox0=\hbox{\ensuremath{#2}}% Store numerator
+\DeclareDocumentCommand{\cofaktor}{s m O{-0.5} m O{0.5}}{% \newfaktor[*][#2]{#3}[#4]{#5} -> #2\#4
+  \setbox0=\hbox{\ensuremath{#3}}% Store numerator
   \setbox1=\hbox{\ensuremath{\diagdown}}% Store slash /
-  \setbox2=\hbox{\ensuremath{#4}}% Store denominator
-  \raisebox{#3\ht1}{\usebox0}% Numerator
+  \setbox2=\hbox{\ensuremath{#5}}% Store denominator
+  \raisebox{#2\ht1}{\usebox0}% Numerator
   \mkern-5mu\ifthenelse{\equal{#1}{\BooleanTrue}}% Slash /
     {\diagdown}% regular \faktor slash
-    {\rotatebox{44}{\rule[-#5\ht2]{0.4pt}{#5\ht2-#3\ht0+\ht0}}}% tilted rule as a slash
+    {\rotatebox{44}{\rule[-#4\ht2]{0.4pt}{#4\ht2-#2\ht0+\ht0}}}% tilted rule as a slash
   \mkern-4mu%
-  \raisebox{#5\ht2}{\usebox2}% Denominator
+  \raisebox{#4\ht2}{\usebox2}% Denominator
 }