diff --git a/NEWS.md b/NEWS.md
index 9c25706..f60cfb1 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,6 +1,7 @@
 # pmd 0.2.5
 
 - Add KEGG reaction class and enzyme number to the keggrall database
+- Fix url of demo data
 
 # pmd 0.2.4
 
diff --git a/inst/shinyapp/pmd.Rmd b/inst/shinyapp/pmd.Rmd
index 8fb96d6..ba4409b 100644
--- a/inst/shinyapp/pmd.Rmd
+++ b/inst/shinyapp/pmd.Rmd
@@ -18,7 +18,7 @@ knitr::opts_chunk$set(echo = F)
 knitr::include_graphics('https://yufree.github.io/presentation/figure/demomzrt.png')
 ```
 
-The uploaded file should be one csv file. The first column should be peak ID. The second column should be mass to charge ratio of peaks. The third column should be retention time in seconds. The other column should be peaks intensities in each samples. The header should be 'mz', 'rt', and sample names. The second row should include group information of each sample. Such file could be output by `getcsv` function for a 'mzrt' object from enviGCMS package. However, it's also easy to manually write one csv file as shown above. Here is the demo csv [file](https://raw.githubusercontent.com/yufree/rmwf/master/inst/demodata/demomzrt.csv).
+The uploaded file should be one csv file. The first column should be peak ID. The second column should be mass to charge ratio of peaks. The third column should be retention time in seconds. The other column should be peaks intensities in each samples. The header should be 'mz', 'rt', and sample names. The second row should include group information of each sample. Such file could be output by `getcsv` function for a 'mzrt' object from enviGCMS package. However, it's also easy to manually write one csv file as shown above. Here is the demo csv [file](https://raw.githubusercontent.com/yufree/rmwf/master/inst/demodata/pmd/demomzrt.csv).
 
 ### Parameters
 
diff --git a/inst/shinyapp/pmdnet.Rmd b/inst/shinyapp/pmdnet.Rmd
index ddd141e..d203b5f 100644
--- a/inst/shinyapp/pmdnet.Rmd
+++ b/inst/shinyapp/pmdnet.Rmd
@@ -18,7 +18,7 @@ knitr::opts_chunk$set(echo = TRUE)
 knitr::include_graphics('https://yufree.github.io/presentation/figure/democsv.png')
 ```
 
-The uploaded file should be one csv file. The first column should be peak ID. The second column should be mass to charge ratio of peaks. The third column should be retention time in seconds. The other column should be peaks intensities in each samples. The header should be 'mz', 'rt', and sample names. The second row should include group information of each sample. Such file could be output by `getcsv` function for a 'mzrt' object from enviGCMS package. However, it's also easy to manually write one csv file as shown above. Here is the demo csv [file](https://raw.githubusercontent.com/yufree/rmwf/master/inst/demodata/tbbpamzrt.csv).
+The uploaded file should be one csv file. The first column should be peak ID. The second column should be mass to charge ratio of peaks. The third column should be retention time in seconds. The other column should be peaks intensities in each samples. The header should be 'mz', 'rt', and sample names. The second row should include group information of each sample. Such file could be output by `getcsv` function for a 'mzrt' object from enviGCMS package. However, it's also easy to manually write one csv file as shown above. Here is the demo csv [file](https://raw.githubusercontent.com/yufree/rmwf/master/inst/demodata/pmd/tbbpamzrt.csv).
 
 ```{r chain, echo=FALSE}
 inputPanel(