diff --git a/.github/workflows/r_tests.yml b/.github/workflows/r_tests.yml
index 991131ff7..c3c50894f 100644
--- a/.github/workflows/r_tests.yml
+++ b/.github/workflows/r_tests.yml
@@ -100,7 +100,7 @@ jobs:
 
     - name: Install system packages
       run: |
-        sudo apt-get update && sudo apt-get install libcurl4-openssl-dev libssl-dev libssh2-1-dev libgit2-dev
+        sudo apt-get update && sudo apt-get install libcurl4-openssl-dev libssl-dev libssh2-1-dev libgit2-dev pandoc pandoc-citeproc
 
     - name: Install dependencies
       shell: Rscript {0}
diff --git a/dmlc-core b/dmlc-core
index 243d91587..f00e3ec7a 160000
--- a/dmlc-core
+++ b/dmlc-core
@@ -1 +1 @@
-Subproject commit 243d91587d080f97f416433b18c2454179df867c
+Subproject commit f00e3ec7abc9f293a1b7061157b0a4e22a735cf5