diff --git a/.gitignore b/.gitignore
index 40fe1ea..b91c82f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,5 @@
 swirl.Rproj
 *.html
 .DS_Store
+/revdep/library
+/revdep/checks
diff --git a/DESCRIPTION b/DESCRIPTION
index d1af404..a6906c0 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -4,7 +4,7 @@ Description: Use the R console as an interactive learning
     environment. Users receive immediate feedback as they are guided through
     self-paced lessons in data science and R programming.
 URL: http://swirlstats.com
-Version: 2.4.4
+Version: 2.4.4.0001
 License: MIT + file LICENSE
 Authors@R: c(
     person("Sean", "Kross", email = "sean@seankross.com", role = c("aut", "cre")),
diff --git a/R/languages.R b/R/languages.R
index 0394e0a..266d312 100644
--- a/R/languages.R
+++ b/R/languages.R
@@ -2,7 +2,7 @@ swirl_language <- function(){
   lang <- getOption("swirl_language")
   langs <- c("chinese_simplified", "dutch", "english", 
              "french", "german", "german_formal", "korean", "portuguese", 
-             "spanish", "turkish")
+             "russian", "spanish", "turkish")
   
   if(is.null(lang) || !(lang %in% langs)){
     "english"
@@ -28,7 +28,7 @@ swirl_language <- function(){
 select_language <- function(language = NULL, append_rprofile = FALSE){
   langs <- c("chinese_simplified", "dutch", "english", 
              "french", "german", "german_formal", "korean", "portuguese", 
-             "spanish", "turkish")
+             "russian", "spanish", "turkish")
   if(is.null(language)){
     selection <- select.list(langs)
   } else if(!(language %in% langs)){
diff --git a/R/sysdata.rda b/R/sysdata.rda
index a7c219d..bb4ab3a 100644
Binary files a/R/sysdata.rda and b/R/sysdata.rda differ
diff --git a/revdep/README.md b/revdep/README.md
new file mode 100644
index 0000000..0292277
--- /dev/null
+++ b/revdep/README.md
@@ -0,0 +1,58 @@
+# Platform
+
+|field    |value                        |
+|:--------|:----------------------------|
+|version  |R version 3.6.2 (2019-12-12) |
+|os       |Ubuntu 18.04.3 LTS           |
+|system   |x86_64, linux-gnu            |
+|ui       |RStudio                      |
+|language |ru:en                        |
+|collate  |ru_RU.UTF-8                  |
+|ctype    |ru_RU.UTF-8                  |
+|tz       |Europe/Moscow                |
+|date     |2020-01-15                   |
+
+# Dependencies
+
+|package     |old       |new        |Δ  |
+|:-----------|:---------|:----------|:--|
+|swirl       |2.4.4     |2.4.4.0001 |*  |
+|askpass     |1.1       |1.1        |   |
+|assertthat  |0.2.1     |0.2.1      |   |
+|backports   |1.1.5     |1.1.5      |   |
+|bitops      |1.0-6     |1.0-6      |   |
+|callr       |3.4.0     |3.4.0      |   |
+|cli         |2.0.1     |2.0.1      |   |
+|crayon      |1.3.4     |1.3.4      |   |
+|curl        |4.3       |4.3        |   |
+|desc        |1.2.0     |1.2.0      |   |
+|digest      |0.6.23    |0.6.23     |   |
+|ellipsis    |0.3.0     |0.3.0      |   |
+|evaluate    |0.14      |0.14       |   |
+|fansi       |0.4.1     |0.4.1      |   |
+|glue        |1.3.1     |1.3.1      |   |
+|httr        |1.4.1     |1.4.1      |   |
+|jsonlite    |1.6       |1.6        |   |
+|magrittr    |1.5       |1.5        |   |
+|mime        |0.8       |0.8        |   |
+|openssl     |1.4.1     |1.4.1      |   |
+|pkgbuild    |1.0.6     |1.0.6      |   |
+|pkgload     |1.0.2     |1.0.2      |   |
+|praise      |1.0.0     |1.0.0      |   |
+|prettyunits |1.1.0     |1.1.0      |   |
+|processx    |3.4.1     |3.4.1      |   |
+|ps          |1.3.0     |1.3.0      |   |
+|R6          |2.4.1     |2.4.1      |   |
+|RCurl       |1.95-4.12 |1.95-4.12  |   |
+|rlang       |0.4.2     |0.4.2      |   |
+|rprojroot   |1.3-2     |1.3-2      |   |
+|rstudioapi  |0.10      |0.10       |   |
+|stringi     |1.4.5     |1.4.5      |   |
+|stringr     |1.4.0     |1.4.0      |   |
+|sys         |3.3       |3.3        |   |
+|testthat    |2.3.1     |2.3.1      |   |
+|withr       |2.1.2     |2.1.2      |   |
+|yaml        |2.2.0     |2.2.0      |   |
+
+# Revdeps
+
diff --git a/revdep/check.R b/revdep/check.R
index 57b0600..a8e58c9 100644
--- a/revdep/check.R
+++ b/revdep/check.R
@@ -1,4 +1,6 @@
-library("devtools")
+# library("devtools")
+# install_github("r-lib/revdepcheck", type = "source")
+library("revdepcheck")
 
-res <- revdep_check()
-revdep_check_save_summary()
+revdep_check()
+revdep_report()
diff --git a/revdep/data.sqlite b/revdep/data.sqlite
new file mode 100644
index 0000000..7b934ad
Binary files /dev/null and b/revdep/data.sqlite differ
diff --git a/revdep/failures.md b/revdep/failures.md
new file mode 100644
index 0000000..9a20736
--- /dev/null
+++ b/revdep/failures.md
@@ -0,0 +1 @@
+*Wow, no problems at all. :)*
\ No newline at end of file
diff --git a/revdep/problems.md b/revdep/problems.md
new file mode 100644
index 0000000..9a20736
--- /dev/null
+++ b/revdep/problems.md
@@ -0,0 +1 @@
+*Wow, no problems at all. :)*
\ No newline at end of file