diff --git a/.Rbuildignore b/.Rbuildignore
index 37f909d..34964c1 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -9,3 +9,4 @@ cran-comments.md
 RunRStudio
 ^codecov\.yml$
 ^\.github$
+^CRAN-SUBMISSION$
diff --git a/DESCRIPTION b/DESCRIPTION
index 251cb26..01013b5 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: lazytrade
 Type: Package
 Title: Learn Computer and Data Science using Algorithmic Trading
-Version: 0.5.2
+Version: 0.5.3
 Author: Vladimir Zhbanko
 Maintainer: Vladimir Zhbanko <vladimir.zhbanko@gmail.com>
 Description: Provide sets of functions and methods to learn and practice data science using idea of algorithmic trading.
@@ -16,7 +16,7 @@ URL: https://vladdsm.github.io/myblog_attempt/topics/lazy%20trading/, https://gi
 BugReports: https://github.com/vzhomeexperiments/lazytrade/issues
 Encoding: UTF-8
 LazyData: true
-RoxygenNote: 7.1.1
+RoxygenNote: 7.1.2
 Imports:
     readr,
     stringr,
@@ -37,5 +37,5 @@ Suggests:
     magrittr,
     data.table,
     bit64
-Depends: R (>= 3.4.0)
+Depends: R (>= 3.6.0)
 Roxygen: list(markdown = TRUE)
diff --git a/NEWS.md b/NEWS.md
index b868bb7..924e075 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -5,6 +5,15 @@
 * setup github actions
 * add fail safe for function input parameters
 
+# lazytrade 0.5.3
+
+# Version 0.5.3
+
+## Changes
+
+* removed as.vector from example code to fix error in R-devel builds
+* increased min R version to 3.6.0
+
 # lazytrade 0.5.2
 
 # Version 0.5.2
diff --git a/R/util_profit_factor.R b/R/util_profit_factor.R
index e88106b..7d2feb3 100644
--- a/R/util_profit_factor.R
+++ b/R/util_profit_factor.R
@@ -23,7 +23,7 @@
 #'    summarise(PnL = sum(X5),
 #'              NumTrades = n(),
 #'              PrFact = util_profit_factor(X5)) %>%
-#'    select(PrFact) %>% head(1) %>% as.vector() %>% round(3)
+#'    select(PrFact) %>% head(1) %>% round(3)
 #'
 #'
 util_profit_factor <- function(x){
diff --git a/README.Rmd b/README.Rmd
index 947a7f1..3e12e9e 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -15,7 +15,7 @@ knitr::opts_chunk$set(
 # lazytrade
 
 <!-- badges: start -->
-[![codecov](https://codecov.io/gh/vzhomeexperiments/lazytrade/branch/master/graph/badge.svg)](https://codecov.io/gh/vzhomeexperiments/lazytrade)
+[![codecov](https://codecov.io/gh/vzhomeexperiments/lazytrade/branch/master/graph/badge.svg)](https://app.codecov.io/gh/vzhomeexperiments/lazytrade)
 [![CRAN status](https://www.r-pkg.org/badges/version/lazytrade)](https://CRAN.R-project.org/package=lazytrade)
 [![Lifecycle: experimental](https://img.shields.io/badge/lifecycle-experimental-orange.svg)](https://lifecycle.r-lib.org/articles/stages.html#experimental)
 [![R-CMD-check](https://github.com/vzhomeexperiments/lazytrade/workflows/R-CMD-check/badge.svg)](https://github.com/vzhomeexperiments/lazytrade/actions)
@@ -113,7 +113,7 @@ rl_generate_policy(data_trades, states, actions, control)
 
 ## Example - generating passwords for trading platforms login
 
-Multiple trading accounts require passwords, package contains function that may easily generate random passwords:
+Multiple trading accounts require passwords, package contains function that may easily generate random passwords: 
 
 ```{r message=FALSE, warning=FALSE}
 library(lazytrade)
diff --git a/README.md b/README.md
index eb2eca9..afe35b1 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 
 <!-- badges: start -->
 
-[![codecov](https://codecov.io/gh/vzhomeexperiments/lazytrade/branch/master/graph/badge.svg)](https://codecov.io/gh/vzhomeexperiments/lazytrade)
+[![codecov](https://codecov.io/gh/vzhomeexperiments/lazytrade/branch/master/graph/badge.svg)](https://app.codecov.io/gh/vzhomeexperiments/lazytrade)
 [![CRAN
 status](https://www.r-pkg.org/badges/version/lazytrade)](https://CRAN.R-project.org/package=lazytrade)
 [![Lifecycle:
@@ -159,7 +159,7 @@ library(readr)
 #generate 8digit password for trading platform
 util_generate_password(salt = 'random text')
 #>          .
-#> 1 8a289ED5
+#> 1 58e23E45
 ```
 
 ## Example - generate initialization files for MT4 platform
@@ -307,6 +307,9 @@ library(testthat)
 #> The following object is masked from 'package:dplyr':
 #> 
 #>     matches
+#> The following objects are masked from 'package:readr':
+#> 
+#>     edition_get, local_edition
 #> The following objects are masked from 'package:magrittr':
 #> 
 #>     equals, is_less_than, not
diff --git a/cran-comments.md b/cran-comments.md
index 9f521b6..6114d4c 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -1,15 +1,13 @@
 ## Test environments
-* Docker Container, R 4.1.0 (2021-05-18) -- "Camp Pontanezen"
-Platform: x86_64-pc-linux-gnu (64-bit)
 * R-hub builder 
-Platform:	Debian Linux, R-devel, GCC
+Platform:	Windows Server 2022, R-devel, 64 bit
 * Winbuilder
-* R version 4.1.0 (2021-05-18)
-* R Under development (unstable) (2021-06-18 r80528)
+* R version 4.1.2 (2021-11-01)
+* R Under development (unstable) (2021-12-14 r81376 ucrt)
 
 ## R CMD check results
 Status: OK
-R version R 4.1.0 (2021-05-18)
+R version 4.1.2 (2021-11-01) -- "Bird Hippie"
 
 There were no ERRORs or WARNINGs or NOTEs
 
diff --git a/man/util_profit_factor.Rd b/man/util_profit_factor.Rd
index 131994d..bef1eed 100644
--- a/man/util_profit_factor.Rd
+++ b/man/util_profit_factor.Rd
@@ -28,7 +28,7 @@ profit_factor_data \%>\%
    summarise(PnL = sum(X5),
              NumTrades = n(),
              PrFact = util_profit_factor(X5)) \%>\%
-   select(PrFact) \%>\% head(1) \%>\% as.vector() \%>\% round(3)
+   select(PrFact) \%>\% head(1) \%>\% round(3)
 
 
 }
diff --git a/tests/testthat/test-util_profit_factor.R b/tests/testthat/test-util_profit_factor.R
index ebaf56f..a4e4ff7 100644
--- a/tests/testthat/test-util_profit_factor.R
+++ b/tests/testthat/test-util_profit_factor.R
@@ -1,3 +1,4 @@
+library(lazytrade)
 library(testthat)
 library(magrittr)
 library(dplyr)
@@ -15,7 +16,6 @@ test_that("test value of the calculation", {
               PrFact = util_profit_factor(X5)) %>%
     select(PrFact) %>%
     head(1) %>%
-    as.vector() %>%
     round(3)
 
   expect_equal(DF_Stats$PrFact, 0.68)