diff --git a/bwase.c b/bwase.c
index 746add5..540aa6a 100644
--- a/bwase.c
+++ b/bwase.c
@@ -180,7 +180,7 @@ bwa_cigar_t *bwa_refine_gapped_core(bwtint_t l_pac, const ubyte_t *pacseq, int l
 	assert(re <= l_pac);
 	rseq = bns_get_seq(l_pac, pacseq, rb, re, &rlen);
 	assert(re - rb == rlen);
-	ksw_global(len, seq, rlen, rseq, 5, mat, 5, 1, SW_BW, n_cigar, &cigar32);
+	ksw_global(len, seq, rlen, rseq, 5, mat, 5, 1, SW_BW > abs(rlen - len) * 1.5? SW_BW : abs(rlen - len) * 1.5, n_cigar, &cigar32);
 	assert(*n_cigar > 0);
 	if ((cigar32[*n_cigar - 1]&0xf) == 1) cigar32[*n_cigar - 1] = (cigar32[*n_cigar - 1]>>4<<4) | 3; // change endding ins to soft clipping
 	if ((cigar32[0]&0xf) == 1) cigar32[0] = (cigar32[0]>>4<<4) | 3; // change beginning ins to soft clipping
diff --git a/main.c b/main.c
index 6d3e301..4ebdfe8 100644
--- a/main.c
+++ b/main.c
@@ -4,7 +4,7 @@
 #include "utils.h"
 
 #ifndef PACKAGE_VERSION
-#define PACKAGE_VERSION "0.7.5a-r423"
+#define PACKAGE_VERSION "0.7.5a-r424"
 #endif
 
 int bwa_fa2pac(int argc, char *argv[]);