diff --git a/texmf/tex/latex/astron/astron.cls b/texmf/tex/latex/astron/astron.cls
index c38b21a034bb00af5584695b04a369fee411aa08..517ae396f933381fe0344bcd9829a09f6ecfedde 100644
--- a/texmf/tex/latex/astron/astron.cls
+++ b/texmf/tex/latex/astron/astron.cls
@@ -19,6 +19,7 @@
 \RequirePackage{geometry}
 \RequirePackage{graphicx}
 \RequirePackage{lastpage}
+\RequirePackage{microtype}
 \RequirePackage{parskip}
 \RequirePackage{tabularx}