diff --git a/src/zcash/Zcash.h b/src/zcash/Zcash.h
index 0c2d569a9..665c3f0cf 100644
--- a/src/zcash/Zcash.h
+++ b/src/zcash/Zcash.h
@@ -3,7 +3,7 @@
 
 #define ZC_NUM_JS_INPUTS 2
 #define ZC_NUM_JS_OUTPUTS 2
-#define INCREMENTAL_MERKLE_TREE_DEPTH 20
+#define INCREMENTAL_MERKLE_TREE_DEPTH 29
 #define INCREMENTAL_MERKLE_TREE_DEPTH_TESTING 4
 
 #define ZC_NOTEPLAINTEXT_LEADING 1