diff --git a/debian/update-version.sh b/debian/update-version.sh
index e28cf6ad71..5024c69b05 100644
--- a/debian/update-version.sh
+++ b/debian/update-version.sh
@@ -9,14 +9,15 @@ local ORIG=$1 NEW=$2
 
 ORIG_M1=$(prev_stable $ORIG)
 NEW_M1=$(prev_stable $NEW)
+ORIG_R="${ORIG/./\\.}" # match a literal dot, otherwise this might sometimes match e.g. debhelper (>= 9.20141010)
 
-sed -i -e "s|libstd-rust-$ORIG|libstd-rust-$NEW|g" \
-       -e "s|rustc (<= $ORIG|rustc (<= $NEW|g" \
-       -e "s|rustc (>= ${ORIG_M1}|rustc (>= ${NEW_M1}|g" control
+sed -i -e "s|libstd-rust-${ORIG_R}|libstd-rust-$NEW|g" \
+       -e "s|rustc (<= ${ORIG_R}|rustc (<= $NEW|g" \
+       -e "s|rustc (>= ${ORIG_M1/./\\.}|rustc (>= ${NEW_M1}|g" control
 
 git mv libstd-rust-$ORIG.lintian-overrides libstd-rust-$NEW.lintian-overrides
-sed -i -e "s|libstd-rust-$ORIG|libstd-rust-$NEW|g" libstd-rust-$NEW.lintian-overrides
-sed -i -e "s|libstd-rust-$ORIG|libstd-rust-$NEW|g" source/lintian-overrides
+sed -i -e "s|libstd-rust-${ORIG_R}|libstd-rust-$NEW|g" libstd-rust-$NEW.lintian-overrides
+sed -i -e "s|libstd-rust-${ORIG_R}|libstd-rust-$NEW|g" source/lintian-overrides
 }
 
 update 1.9 1.10