diff --git a/Makefile b/Makefile
index 29dd3c5..80276b0 100644
--- a/Makefile
+++ b/Makefile
@@ -25,6 +25,8 @@ DBADDR = "0.0.0.0:27017"  # don't use localhost
 include env.local
 
 N_CORES = 5
+# insert kres files into database in chunks, for fewer connections
+KRES_CHUNK_SIZE = 100
 export
 
 .PHONY: python-env fill-database
@@ -76,6 +78,7 @@ fill-database-kres: data/samples
 		--ssj-file $(SSJ_FILE) --kres-srl-folder $(KRES_SRL_FOLDER) \
 		--output $(OUTPUT) --outdir $(OUTDIR) --dbaddr $(DBADDR) \
 		--dbuser $(DB_USR_USER) --dbpass $(DB_USR_PASS) \
+		--chunk-size $(KRES_CHUNK_SIZE) \
 		--cores $(N_CORES)
 
 
diff --git a/src/pkg/cjvt-corpusparser b/src/pkg/cjvt-corpusparser
index 3276619..792c0b0 160000
--- a/src/pkg/cjvt-corpusparser
+++ b/src/pkg/cjvt-corpusparser
@@ -1 +1 @@
-Subproject commit 3276619e6f69c5a8fbc8e163d489904303a4a91c
+Subproject commit 792c0b03fdc0e58f4ed886f8b3b7414db27f7303