diff --git a/README.md b/README.md
index b06a8ee..c1e4f05 100644
--- a/README.md
+++ b/README.md
@@ -74,8 +74,7 @@ A standard VCF can be used as a mutation file, with file extension `.vcf` or `.V
 ```shell
 mutscan -1 R1.fq -2 R2.fq -m target.vcf -r hg19.fa -h report.html
 ```
-* if the VCF file is smaller than 100 records, all records can be scanned
-* if the VCF file has more than 100 records, you should add `--mark` in the command line, and then mark the wanted records with the `FILTER` column marked `M`. For example (note the M in the FILTER column):
+* if the VCF file has too many records, you will get a very big HTML file if you scan all the variants. You can add `--mark` in the command line, and then mark the wanted records with the `FILTER` column marked `M`. For example (note the M in the FILTER column):
 ```
 #CHROM   POS     ID          REF ALT QUAL  FILTER  INFO
 1        69224   COSM3677745 A   C   .     M       This record will be scanned
diff --git a/src/common.h b/src/common.h
index 5aedaa3..a570ceb 100644
--- a/src/common.h
+++ b/src/common.h
@@ -1,7 +1,7 @@
 #ifndef COMMON_H
 #define COMMON_H
 
-#define MUTSCAN_VER "1.8.0"
+#define MUTSCAN_VER "1.9.0"
 
 typedef long int64;
 typedef unsigned long uint64;
diff --git a/src/mutation.cpp b/src/mutation.cpp
index e812caa..eee76d3 100644
--- a/src/mutation.cpp
+++ b/src/mutation.cpp
@@ -246,7 +246,7 @@ vector<Mutation> Mutation::parseVcf(string vcfFile, string refFile) {
         mutations.push_back(mut);
     }
     if(mutations.size() <= 0){
-        cerr<<"No mutation will be scanned"<<endl;
+        cerr<<"No mutation to be scanned"<<endl;
         if(markedOnly){
             cerr<<"You are using --mark option, you should mark the wanted VCF records with FILTER as M"<<endl;
             cerr<<"Example (note the M in the FILTER column):"<<endl;