diff --git a/minimap.h b/minimap.h
index 8930cd5..8eaa1ce 100644
--- a/minimap.h
+++ b/minimap.h
@@ -5,7 +5,7 @@
 #include <stdio.h>
 #include <sys/types.h>
 
-#define MM_VERSION "2.27-r1206-dirty"
+#define MM_VERSION "2.27-r1207-dirty"
 
 #define MM_F_NO_DIAG       (0x001LL) // no exact diagonal hit
 #define MM_F_NO_DUAL       (0x002LL) // skip pairs where query name is lexicographically larger than target name
diff --git a/options.c b/options.c
index 5dd6af9..c0b67e6 100644
--- a/options.c
+++ b/options.c
@@ -55,7 +55,7 @@ void mm_mapopt_init(mm_mapopt_t *opt)
 	opt->max_clip_ratio = 1.0f;
 	opt->mini_batch_size = 500000000;
 	opt->max_sw_mat = 100000000;
-	opt->cap_kalloc = 1000000000;
+	opt->cap_kalloc = 500000000;
 
 	opt->rank_min_len = 500;
 	opt->rank_frac = 0.9f;