diff --git a/1.2/Defs/Drugs/Drugs_Antibiotics.xml b/1.2/Defs/Drugs/Drugs_Antibiotics.xml
index 152acb2..70ac779 100644
--- a/1.2/Defs/Drugs/Drugs_Antibiotics.xml
+++ b/1.2/Defs/Drugs/Drugs_Antibiotics.xml
@@ -123,7 +123,7 @@
           </li>
         </capMods>
         <statOffsets>
-          <ImmunityGainSpeed>2</ImmunityGainSpeed>
+          <ImmunityGainSpeed>1.5</ImmunityGainSpeed>
         </statOffsets>
       </li>
       <li>