diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index 8ef088d..bd623f3 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -1,4 +1,4 @@
-# Workflow derived from https://github.com/r-lib/actions/tree/master/examples
+# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
 # Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
 on:
   push:
@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - {os: macOS-latest,   r: 'release'}
+          - {os: macos-latest,   r: 'release'}
           - {os: windows-latest, r: 'release'}
           - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
           - {os: ubuntu-latest,   r: 'release'}
@@ -29,18 +29,18 @@ jobs:
       R_KEEP_PKG_SOURCE: yes
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
-      - uses: r-lib/actions/setup-pandoc@v1
+      - uses: r-lib/actions/setup-pandoc@v2
 
-      - uses: r-lib/actions/setup-r@v1
+      - uses: r-lib/actions/setup-r@v2
         with:
           r-version: ${{ matrix.config.r }}
           http-user-agent: ${{ matrix.config.http-user-agent }}
           use-public-rspm: true
 
-      - uses: r-lib/actions/setup-r-dependencies@v1
+      - uses: r-lib/actions/setup-r-dependencies@v2
         with:
-          extra-packages: rcmdcheck
+          extra-packages: any::rcmdcheck
 
-      - uses: r-lib/actions/check-r-package@v1
+      - uses: r-lib/actions/check-r-package@v2
diff --git a/.github/workflows/pkgdown.yaml b/.github/workflows/pkgdown.yaml
index 0b26021..5d10623 100644
--- a/.github/workflows/pkgdown.yaml
+++ b/.github/workflows/pkgdown.yaml
@@ -11,6 +11,8 @@ on:
 
 name: pkgdown
 
+permissions: read-all
+
 jobs:
   pkgdown:
     runs-on: ubuntu-latest
@@ -19,8 +21,10 @@ jobs:
       group: pkgdown-${{ github.event_name != 'pull_request' || github.run_id }}
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+    permissions:
+      contents: write
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - uses: r-lib/actions/setup-pandoc@v2
 
@@ -39,8 +43,8 @@ jobs:
 
       - name: Deploy to GitHub pages 🚀
         if: github.event_name != 'pull_request'
-        uses: JamesIves/github-pages-deploy-action@4.1.4
+        uses: JamesIves/github-pages-deploy-action@v4.5.0
         with:
           clean: false
           branch: gh-pages
-          folder: docs
+          folder: docs
\ No newline at end of file
diff --git a/DESCRIPTION b/DESCRIPTION
index e83688a..fe96b9e 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: tidync
 Title: A Tidy Approach to 'NetCDF' Data Exploration and Extraction
-Version: 0.3.0.9002
+Version: 0.3.1
 Authors@R: c(person("Michael", "Sumner", email = "mdsumner@gmail.com", role = c("aut", "cre")), 
              person("Simon", "Wotherspoon", role = "ctb"), 
              person("Tomas", "Remenyi", role = "ctb"), 
diff --git a/NAMESPACE b/NAMESPACE
index 962bf96..29a1b7b 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -56,4 +56,4 @@ importFrom(stats,setNames)
 importFrom(tibble,as_tibble)
 importFrom(utils,head)
 importFrom(CFtime,CFtime)
-importFrom(CFtime,CFtimestamp)
+importFrom(CFtime,as_timestamp)
diff --git a/R/hyper_transforms.R b/R/hyper_transforms.R
index 9e373ce..bb3ebe4 100644
--- a/R/hyper_transforms.R
+++ b/R/hyper_transforms.R
@@ -94,7 +94,7 @@ hyper_transforms.default <- function(x, all = FALSE, ...) {
       else calendar <- unlist(dim_atts$value[cal_idx])
       try({
         cft <- CFtime::CFtime(units, calendar, axis[[1]])
-        axis$timestamp = CFtime::CFtimestamp(cft)
+        axis$timestamp = CFtime::as_timestamp(cft)
       }, silent = TRUE)
     }