diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8f5be73f..4998eb9e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -11,7 +11,7 @@ jobs:
   run_tests:
     name: "Test pVACtools in various Python versions"
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
diff --git a/docs/pvacview/prerequisites.rst b/docs/pvacview/prerequisites.rst
index c0244a8f..a105f726 100644
--- a/docs/pvacview/prerequisites.rst
+++ b/docs/pvacview/prerequisites.rst
@@ -46,7 +46,7 @@ Additionally, there are a number of packages you will need to install in your R/
   install.packages("shinycssloaders", dependencies=TRUE)
   install.packages("RCurl", dependencies=TRUE)
   install.packages("curl", dependencies=TRUE)
-  install.packages("string", dependencies=TRUE)
+  install.packages("stringr", dependencies=TRUE)
   install.packages("shinycssloaders", dependencies=TRUE)
   install.packages("plotly", dependencies=TRUE)
   install.packages("shinyWidgets", dependencies=TRUE)