diff --git a/NEWS.md b/NEWS.md
index 78a88a1..c92f1fa 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -5,6 +5,11 @@
   to read its decisions, and how the schema is versioned. The nomologR README
   carries the mirror section, so the handoff can be found from either
   package's front page.
+* Krippendorff (2011) now links to the copy on the Annenberg School's site,
+  because the Penn repository copy had become unreliable to reach: it
+  answered in 2 to 10 seconds, returned a server error, and timed out. It is
+  the same paper, dated 2011.1.25, with its reading list updated in 2013. The
+  expert-panel vignette's reference list now gives the link too.
 
 # contentvalidR 0.10.0
 
diff --git a/R/panel_agreement.R b/R/panel_agreement.R
index 0146813..8284261 100644
--- a/R/panel_agreement.R
+++ b/R/panel_agreement.R
@@ -140,7 +140,7 @@
 #'
 #' Krippendorff, K. (2011). *Computing Krippendorff's alpha-reliability*.
 #' Annenberg School for Communication, University of Pennsylvania.
-#' \url{https://repository.upenn.edu/items/034a6030-c584-4d14-9d3d-7b7e8d16df20}
+#' \url{https://www.asc.upenn.edu/sites/default/files/2021-03/Computing\%20Krippendorff\%27s\%20Alpha-Reliability.pdf}
 #'
 #' Vach, W., & Gerke, O. (2023). Gwet's AC1 is not a substitute for Cohen's
 #' kappa: A comparison of basic properties. *MethodsX, 10*, 102212.
diff --git a/README.Rmd b/README.Rmd
index 4bae7b2..7d54ded 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -204,7 +204,7 @@ Works cited in this README, the help pages, and the vignettes.
 - Howard, M. C., & Melloy, R. C. (2016). Evaluating item-sort task methods: The presentation of a new statistical significance formula and methodological best practices. *Journal of Business and Psychology, 31*(1), 173–186. https://doi.org/10.1007/s10869-015-9404-y
 - Hubert, L., & Arabie, P. (1985). Comparing partitions. *Journal of Classification, 2*(1), 193–218. https://doi.org/10.1007/BF01908075
 - Klar, N., Lipsitz, S. R., Parzen, M., & Leong, T. (2002). An exact bootstrap confidence interval for kappa in small samples. *Journal of the Royal Statistical Society: Series D (The Statistician), 51*(4), 467–478. https://doi.org/10.1111/1467-9884.00331
-- Krippendorff, K. (2011). *Computing Krippendorff's alpha-reliability*. Annenberg School for Communication, University of Pennsylvania. https://repository.upenn.edu/items/034a6030-c584-4d14-9d3d-7b7e8d16df20
+- Krippendorff, K. (2011). *Computing Krippendorff's alpha-reliability*. Annenberg School for Communication, University of Pennsylvania. https://www.asc.upenn.edu/sites/default/files/2021-03/Computing%20Krippendorff%27s%20Alpha-Reliability.pdf
 - Landis, J. R., & Koch, G. G. (1977). The measurement of observer agreement for categorical data. *Biometrics, 33*(1), 159–174. https://doi.org/10.2307/2529310
 - Lawshe, C. H. (1975). A quantitative approach to content validity. *Personnel Psychology, 28*(4), 563–575. https://doi.org/10.1111/j.1744-6570.1975.tb01393.x
 - Linacre, J. M. (1989). *Many-facet Rasch measurement*. MESA Press.
diff --git a/README.md b/README.md
index ca52eb1..97ba6d3 100644
--- a/README.md
+++ b/README.md
@@ -434,7 +434,7 @@ Works cited in this README, the help pages, and the vignettes.
   467–478. <https://doi.org/10.1111/1467-9884.00331>
 - Krippendorff, K. (2011). *Computing Krippendorff’s alpha-reliability*.
   Annenberg School for Communication, University of Pennsylvania.
-  <https://repository.upenn.edu/items/034a6030-c584-4d14-9d3d-7b7e8d16df20>
+  <https://www.asc.upenn.edu/sites/default/files/2021-03/Computing%20Krippendorff%27s%20Alpha-Reliability.pdf>
 - Landis, J. R., & Koch, G. G. (1977). The measurement of observer
   agreement for categorical data. *Biometrics, 33*(1), 159–174.
   <https://doi.org/10.2307/2529310>
diff --git a/inst/REFERENCES.bib b/inst/REFERENCES.bib
index 57f936d..e3bb9bc 100644
--- a/inst/REFERENCES.bib
+++ b/inst/REFERENCES.bib
@@ -325,7 +325,7 @@ @techreport{krippendorff2011
   title = {{Computing Krippendorff's alpha-reliability}},
   institution = {Annenberg School for Communication, University of Pennsylvania},
   type = {Manuscript},
-  url = {https://repository.upenn.edu/items/034a6030-c584-4d14-9d3d-7b7e8d16df20}
+  url = {https://www.asc.upenn.edu/sites/default/files/2021-03/Computing%20Krippendorff%27s%20Alpha-Reliability.pdf}
 }
 
 @article{landis1977,
diff --git a/man/panel_agreement.Rd b/man/panel_agreement.Rd
index 895b36a..6c8e141 100644
--- a/man/panel_agreement.Rd
+++ b/man/panel_agreement.Rd
@@ -102,7 +102,7 @@ reliability measure for coding data. \emph{Communication Methods and Measures,
 
 Krippendorff, K. (2011). \emph{Computing Krippendorff's alpha-reliability}.
 Annenberg School for Communication, University of Pennsylvania.
-\url{https://repository.upenn.edu/items/034a6030-c584-4d14-9d3d-7b7e8d16df20}
+\url{https://www.asc.upenn.edu/sites/default/files/2021-03/Computing\%20Krippendorff\%27s\%20Alpha-Reliability.pdf}
 
 Vach, W., & Gerke, O. (2023). Gwet's AC1 is not a substitute for Cohen's
 kappa: A comparison of basic properties. \emph{MethodsX, 10}, 102212.
diff --git a/vignettes/expert-panel-validity.Rmd b/vignettes/expert-panel-validity.Rmd
index bb4bdcf..62fcccb 100644
--- a/vignettes/expert-panel-validity.Rmd
+++ b/vignettes/expert-panel-validity.Rmd
@@ -314,6 +314,7 @@ BookSurge.
 
 Krippendorff, K. (2011). *Computing Krippendorff's alpha-reliability*. Annenberg
 School for Communication, University of Pennsylvania.
+https://www.asc.upenn.edu/sites/default/files/2021-03/Computing%20Krippendorff%27s%20Alpha-Reliability.pdf
 
 Lawshe, C. H. (1975). A quantitative approach to content validity. *Personnel
 Psychology, 28*(4), 563–575. https://doi.org/10.1111/j.1744-6570.1975.tb01393.x