diff --git a/R/col_fact.R b/R/col_fact.R
index 0bab760..1d31275 100644
--- a/R/col_fact.R
+++ b/R/col_fact.R
@@ -14,27 +14,27 @@
 col_fact<-function(string,data,levels=NULL,labels=NULL){
 ## Defining factors for columns containing string (can be vector of multiple strings), based on dplyr.
 ## Factoring several columns with same levels or labels, these can be provided.
-  
+
   require(dplyr)
   d<-data
   s<-string
   n<-c()
-  
+
   for(i in 1:length(s)){
-  n<-c(n,names(select(d,contains(s[i]))))
+  n<-c(n,names(dplyr::select(d,dplyr::contains(s[i]))))
   }
 
   if (!is.null(levels)){
     for(i in 1:length(n)) {
     d[,n[i]]<-factor(d[,n[i]],levels=levels)}}
-    
-    if (!is.null(labels)){ 
+
+    if (!is.null(labels)){
       for(i in 1:length(n)) {
         d[,n[i]]<-factor(d[,n[i]],labels=labels)
   }}
-      else 
+      else
         for(i in 1:length(n)) {
           d[,n[i]]<-factor(d[,n[i]])}
-  
+
   return(d)
 }
diff --git a/R/col_num.R b/R/col_num.R
index 9aa4914..02dc6cd 100644
--- a/R/col_num.R
+++ b/R/col_num.R
@@ -15,11 +15,11 @@ col_num<-function(string,data){
   d<-data
   s<-string
   n<-c()
-  
+
   for(i in 1:length(s)){
-  n<-c(n,names(select(d,contains(s[i]))))
+  n<-c(n,names(dplyr::select(d,dplyr::contains(s[i]))))
   }
-  
+
   for(i in 1:length(n)) {
     d[,n[i]]<-as.numeric(d[,n[i]])
   }