diff --git a/DESCRIPTION b/DESCRIPTION
index bb8e48d..f985778 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: stackr
 Type: Package
 Title: GBS/RADseq Data Exploration, Manipulation and Visualization using R
-Version: 0.3.8
-Date: 2016-09-19
+Version: 0.3.9
+Date: 2016-10-25
 Encoding: UTF-8
 Authors@R: c(
   person("Thierry", "Gosselin", email = "thierrygosselin@icloud.com", role = c("aut", "cre")),
@@ -32,7 +32,8 @@ Imports:
     purrr,
     amap,
     tibble,
-    methods
+    methods,
+    tidyverse
 Suggests:
     pegas,
     hierfstat,
diff --git a/README.md b/README.md
index 86a4c4b..d4d2688 100644
--- a/README.md
+++ b/README.md
@@ -91,6 +91,10 @@ citation("stackr")
 ## New features
 Change log, version, new features and bug history now lives in the [NEWS.md file] (https://github.com/thierrygosselin/stackr/blob/master/NEWS.md)
 
+**v.0.3.9**
+* several performance update
+* couple of bug fix for detecting file formats
+
 **v.0.3.8**
 * fixed a bug in `filter_genotype_likelihood`, since the updated function to the 
 interactive mode, some old code where still present in if/else sentences, breaking 
diff --git a/inst/CITATION b/inst/CITATION
index 8bf6106..ec78161 100644
--- a/inst/CITATION
+++ b/inst/CITATION
@@ -7,5 +7,5 @@ year = "2016",
 author = personList(as.person("Thierry Gosselin"), as.person("Louis Bernatchez")),
 url = "https://github.com/thierrygosselin/stackr",
 doi = "http://dx.doi.org/10.5281/zenodo.53832",
-textVersion = paste("Thierry Gosselin, Louis Bernatchez, (2016). stackr: GBS/RAD Data Exploration, Manipulation and Visualization using R. R package version 0.3.1. https://github.com/thierrygosselin/stackr. doi : 10.5281/zenodo.53832")
+textVersion = paste("Thierry Gosselin, Louis Bernatchez, (2016). stackr: GBS/RAD Data Exploration, Manipulation and Visualization using R. R package version 0.3.9. https://github.com/thierrygosselin/stackr. doi : 10.5281/zenodo.53832")
 )