diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index cea7ca2..07ea572 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -49,7 +49,7 @@ jobs:
         shell: Rscript {0}
 
       - name: Restore R package cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ env.R_LIBS_USER }}
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
diff --git a/.github/workflows/test-coverage.yaml b/.github/workflows/test-coverage.yaml
index ba1f94f..8ea77e3 100644
--- a/.github/workflows/test-coverage.yaml
+++ b/.github/workflows/test-coverage.yaml
@@ -30,7 +30,7 @@ jobs:
         shell: Rscript {0}
 
       - name: Restore R package cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ${{ env.R_LIBS_USER }}
           key: ${{ runner.os }}-${{ hashFiles('.github/R-version') }}-1-${{ hashFiles('.github/depends.Rds') }}
diff --git a/DESCRIPTION b/DESCRIPTION
index 7354954..f1669bc 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -11,8 +11,8 @@ Authors@R: c(
     person(given = "Cristian", 
             family = "Roman-Palacios",
             role = c("aut","cre"),
-            email = "cromanpa94@email.arizona.edu", 
-          comment = c(ORCID="0000-0003-4692-3225")
+            email = "cromanpa@arizona.edu", 
+          comment = c(ORCID="0000-0003-1696-4886")
             ),
     person(given = "April",
           family = "Wright",
@@ -29,13 +29,14 @@ Authors@R: c(
           family = "Norman",
           role = c("rev"))
   )
-URL: https://ropensci.github.io/treedata.table, https://docs.ropensci.org/treedata.table/, https://github.com/ropensci/treedata.table/
+URL: https://ropensci.github.io/treedata.table/, https://docs.ropensci.org/treedata.table/, https://github.com/ropensci/treedata.table/
 BugReports: https://github.com/ropensci/treedata.table/issues
 Description: An implementation that combines trait data and a phylogenetic tree (or trees) into a 
-    single object of class treedata.table. The resulting object can be easily 
+    single object of class 'treedata.table'. The resulting object can be easily 
     manipulated to simultaneously change the trait- and tree-level sampling.
     Currently implemented functions allow users to use a 'data.table' syntax when
-    performing operations on the trait dataset within the treedata.table object.
+    performing operations on the trait dataset within the 'treedata.table' object.
+    For more details see Roman-Palacios et al. (2021) <doi:10.7717/peerj.12450>.
 License: MIT + file LICENSE
 Depends:
   R (>= 2.10),
diff --git a/R/tdt_methods.R b/R/tdt_methods.R
index 45440f9..8a91888 100644
--- a/R/tdt_methods.R
+++ b/R/tdt_methods.R
@@ -2,6 +2,7 @@
 #'
 #' @param x a treedata.table object
 #' @param ... Additional arguments passed to head.data.table
+#' @return First part of an treedata.table object
 #' @examples
 #' data(anolis)
 #' td <- as.treedata.table(anolis$phy, anolis$dat)
@@ -17,6 +18,7 @@ head.treedata.table <- function(x, ...) {
 #'
 #' @param x a treedata.table object
 #' @param ... Additional arguments passed to head.data.table
+#' @return Last part of an treedata.table object
 #' @examples
 #' data(anolis)
 #' td <- as.treedata.table(anolis$phy, anolis$dat)
diff --git a/man/head.treedata.table.Rd b/man/head.treedata.table.Rd
index 2c6a770..f24271a 100644
--- a/man/head.treedata.table.Rd
+++ b/man/head.treedata.table.Rd
@@ -11,6 +11,9 @@
 
 \item{...}{Additional arguments passed to head.data.table}
 }
+\value{
+First part of an treedata.table object
+}
 \description{
 Return the first part of an treedata.table object
 }
diff --git a/man/tail.treedata.table.Rd b/man/tail.treedata.table.Rd
index c251b24..9157bfa 100644
--- a/man/tail.treedata.table.Rd
+++ b/man/tail.treedata.table.Rd
@@ -11,6 +11,9 @@
 
 \item{...}{Additional arguments passed to head.data.table}
 }
+\value{
+Last part of an treedata.table object
+}
 \description{
 Return the last part of an treedata.table object
 }