diff --git a/src/pulsatingscience.ui b/src/pulsatingscience.ui
index c1955d4367f91eb87cb59c0a50842491a2b1d417..93d6827f2dbfc9a466722000903c9cb86bb90a70 100644
--- a/src/pulsatingscience.ui
+++ b/src/pulsatingscience.ui
@@ -231,10 +231,10 @@
           <string>Use this slider to adjust the inclination of the source plane</string>
          </property>
          <property name="minimum">
-          <number>-90</number>
+          <number>0</number>
          </property>
          <property name="maximum">
-          <number>90</number>
+          <number>360</number>
          </property>
          <property name="value">
           <number>0</number>
@@ -300,7 +300,7 @@
           <string>Use this slider to adjust the ssource plan normal (iota)</string>
          </property>
          <property name="minimum">
-          <number>-180</number>
+          <number>0</number>
          </property>
          <property name="maximum">
           <number>180</number>