diff --git a/.github/workflows/render.yml b/.github/workflows/render.yml
index a87dc47..edd748e 100644
--- a/.github/workflows/render.yml
+++ b/.github/workflows/render.yml
@@ -26,6 +26,8 @@ jobs:
       - uses: r-lib/actions/setup-r-dependencies@v2
       - name: Install extra LaTeX packages
         run: sudo apt install texlive-latex-recommended
+      - name: Install required R packages 
+        run:  Rscript -e 'install.packages(c( "rmarkdown", "httr", "jsonlite", "xml2", "dplyr", "ggplot2", "lubridate", "tidyr", "stringr" ))'  
       - run: mkdir report/
       - name: Render documents
         env:
@@ -34,7 +36,7 @@ jobs:
           period_begin: ${{ github.event.inputs.period_begin }}
           period_end: ${{ github.event.inputs.period_end }}
         run: Rscript -e 'rmarkdown::render("dataverse_metrics.Rmd", "all", output_dir="report")'
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: dataverse-metrics
           path: report/
diff --git a/dataverse_metrics.Rmd b/dataverse_metrics.Rmd
index efbc226..21a5454 100644
--- a/dataverse_metrics.Rmd
+++ b/dataverse_metrics.Rmd
@@ -55,7 +55,7 @@ if (file.exists("deposits.rds")) {
 } else { # actually scrape
   deposits <- deposits_get(dataverse_host)
   saveRDS(deposits, "deposits.rds")
-  
+
   projects <- content(GET(paste0(dataverse, "/uniquedownloads/monthly")))
   projects <- bind_rows(projects$data)
   saveRDS(projects, "projects.rds")
@@ -71,6 +71,11 @@ if (file.exists("deposits.rds")) {
     saveRDS(downloads, "downloads.rds")
   }
 }
+# Always Fix inconsistent subject types 
+deposits$subjects <- lapply(deposits$subjects, function(x) { 
+  if (is.null(x) || is.logical(x)) return(NA_character_) 
+      as.character(x) 
+ })
 
 
 ```
@@ -101,55 +106,92 @@ published_new <- deposits %>% filter(as.Date(published_at) < period_end & as.Dat
 deposits %>% group_by(versionState) %>% summarize(n=n()) %>%
   knitr::kable(caption="Total deposits by publication status", col.names=c("Status", "Deposits"))
 
-# all published projects by subject
-deposits_subj <- deposits %>% 
-  filter(versionState=="Published") %>% select(c("subjects")) %>%
-  unnest_longer(subjects) %>% group_by(subjects) %>% summarize(published=n())
-
-# published projects by subject within time frame
-deposits_subj <- deposits %>% 
-  filter(as.Date(published_at) < period_end & as.Date(published_at) > period_begin & 
-           versionState=="Published") %>%
-  select(c("subjects")) %>% unnest_longer(subjects) %>% group_by(subjects) %>%
-  summarize(period=n()) %>% full_join(deposits_subj)
-
-# Any unpublished projects?
-if (any(deposits$versionState=="Unpublished")) {
-  deposits_subj <- deposits %>% filter(versionState=="Unpublished") %>% select(c("subjects")) %>%
-    unnest_longer(subjects) %>% group_by(subjects) %>%
-    summarize(unpublished=n()) %>% full_join(deposits_subj)
+
+# helper to safely unnest and coerce
+as_char_subjects <- function(df) {
+  df %>%
+    unnest_longer(subjects, keep_empty = TRUE) %>% 
+    mutate(subjects = as.character(subjects)) %>%
+    tidyr::replace_na(list(subjects = "Unknown"))
+}
+
+# 1) Total published by subject (all time)
+published_all <- deposits %>%
+  filter(versionState == "Published") %>%
+  select(subjects) %>%
+  as_char_subjects() %>%
+  group_by(subjects) %>%
+  summarize(published = n(), .groups = "drop")
+
+# 2) Published in period by subject
+published_period <- deposits %>%
+  filter(versionState == "Published",
+         as.Date(published_at) < period_end,
+         as.Date(published_at) > period_begin) %>%
+  select(subjects) %>%
+  as_char_subjects() %>%
+  group_by(subjects) %>%
+  summarize(period = n(), .groups = "drop")
+
+# 3) Unpublished totals by subject (if any)
+if (any(deposits$versionState == "Unpublished")) {
+  unpublished_all <- deposits %>%
+    filter(versionState == "Unpublished") %>%
+    select(subjects) %>%
+    as_char_subjects() %>%
+    group_by(subjects) %>%
+    summarize(unpublished = n(), .groups = "drop")
 } else {
-  deposits_subj$unpublished <- 0
+  unpublished_all <- tibble(subjects = character(), unpublished = integer())
 }
 
-# Any unpublished in the time period specified?
-if (any(subset(deposits, as.Date(createdAt) < period_end &
-               as.Date(createdAt) > period_begin)$versionState=="Unpublished")) {
-  deposits_subj <- deposits %>% filter(versionState == "Unpublished" & 
-                                      as.Date(createdAt) < period_end &
-                                      as.Date(createdAt) > period_begin) %>%
-    select(c("subjects")) %>% unnest_longer(subjects) %>% group_by(subjects) %>%
-    summarize(unpublished_period=n()) %>% full_join(deposits_subj)
+# 4) Unpublished in period by subject (if any)
+if (any(subset(deposits,
+               as.Date(createdAt) < period_end & as.Date(createdAt) > period_begin)$versionState == "Unpublished")) {
+  unpublished_period <- deposits %>%
+    filter(versionState == "Unpublished",
+           as.Date(createdAt) < period_end,
+           as.Date(createdAt) > period_begin) %>%
+    select(subjects) %>%
+    as_char_subjects() %>%
+    group_by(subjects) %>%
+    summarize(unpublished_period = n(), .groups = "drop")
 } else {
-  deposits_subj$unpublished_period <- 0
+  unpublished_period <- tibble(subjects = character(), unpublished_period = integer())
 }
 
-# exclude unpublished columns if missing dataverse key
-if (dataverse_key=="") {
+# Combine (all joins now match on a character 'subjects')
+deposits_subj <- published_all %>%
+  full_join(published_period, by = "subjects") %>%
+  full_join(unpublished_all, by = "subjects") %>%
+  full_join(unpublished_period, by = "subjects") %>%
+  arrange(subjects)
+
+# Columns depending on token presence
+if (identical(dataverse_key, "") || is.na(dataverse_key)) {
   include_columns <- c("subjects", "period", "published")
   column_names <- c("Subject",
-    paste("Published between", period_begin, "and", period_end),
-    "Total published")
+                    paste("Published between", period_begin, "and", period_end),
+                    "Total published")
 } else {
-  include_columns <- c("subjects", "unpublished_period",
-                  "unpublished", "period", "published")
-  column_names <- c("Subject", paste("Unpublished between", period_begin, "and", period_end), "Total draft", paste("Published between", period_begin, "and", period_end), "Total published")
+  include_columns <- c("subjects", "unpublished_period", "unpublished", "period", "published")
+  column_names <- c("Subject",
+                    paste("Unpublished between", period_begin, "and", period_end),
+                    "Total draft",
+                    paste("Published between", period_begin, "and", period_end),
+                    "Total published")
 }
 
-# make the table
 deposits_subj[, include_columns] %>%
-  knitr::kable(caption="Deposits by subject",
-               col.names=column_names)
+  tidyr::replace_na(list(
+    unpublished_period = 0L,
+    unpublished        = 0L,
+    period             = 0L,
+    published          = 0L
+  )) %>%
+  knitr::kable(caption = "Deposits by subject",
+               col.names = column_names)
+
 
 ```