diff --git a/bin/deprecate-email b/bin/deprecate-email
index f48fb1a..f4e245c 100755
--- a/bin/deprecate-email
+++ b/bin/deprecate-email
@@ -15,27 +15,29 @@ new_name="$(git config user.name)"
 
 # Replacing author and committer emails has to be done separately to avoid unintentional overwrites
 # e.g. in commits with multiple authors.
-(export FILTER_BRANCH_SQUELCH_WARNING=1 && \
-echo "1/2 Overwriting committer" && \
-git filter-branch -f --commit-filter "
-	if [ \"\$GIT_COMMITTER_EMAIL\" = \"$old_email\" ] || \
-	([ \"\$GIT_COMMITTER_EMAIL\" = \"noreply@github.com\" ] && \
-		([ \"\$GIT_AUTHOR_EMAIL\" = \"$old_email\" ] || \
-		[ \"\$GIT_AUTHOR_EMAIL\" = \"$new_email\" ]));
-	then
-		GIT_COMMITTER_NAME=\"$new_name\";
-		GIT_COMMITTER_EMAIL=\"$new_email\";
-		git commit-tree \"\$@\";
-	else
-		git commit-tree \"\$@\";
-	fi" HEAD && \
-echo "2/2 Overwriting author" && \
-git filter-branch -f --commit-filter "
-	if [ \"\$GIT_AUTHOR_EMAIL\" = \"$old_email\" ];
-	then
-		GIT_AUTHOR_NAME=\"$new_name\";
-		GIT_AUTHOR_EMAIL=\"$new_email\";
-		git commit-tree \"\$@\";
-	else
-		git commit-tree \"\$@\";
-	fi" HEAD)
+(
+	export FILTER_BRANCH_SQUELCH_WARNING=1
+	echo "1/2 Overwriting committer"
+	git filter-branch -f --commit-filter "
+		if [ \"\$GIT_COMMITTER_EMAIL\" = \"$old_email\" ] || \
+		([ \"\$GIT_COMMITTER_EMAIL\" = \"noreply@github.com\" ] && \
+			([ \"\$GIT_AUTHOR_EMAIL\" = \"$old_email\" ] || \
+			[ \"\$GIT_AUTHOR_EMAIL\" = \"$new_email\" ]));
+		then
+			GIT_COMMITTER_NAME=\"$new_name\";
+			GIT_COMMITTER_EMAIL=\"$new_email\";
+			git commit-tree \"\$@\";
+		else
+			git commit-tree \"\$@\";
+		fi" HEAD
+	echo "2/2 Overwriting author"
+	git filter-branch -f --commit-filter "
+		if [ \"\$GIT_AUTHOR_EMAIL\" = \"$old_email\" ];
+		then
+			GIT_AUTHOR_NAME=\"$new_name\";
+			GIT_AUTHOR_EMAIL=\"$new_email\";
+			git commit-tree \"\$@\";
+		else
+			git commit-tree \"\$@\";
+		fi" HEAD
+)