diff --git a/.github/workflows/qc.yml b/.github/workflows/qc.yml
index 20f6ab6..110af6c 100644
--- a/.github/workflows/qc.yml
+++ b/.github/workflows/qc.yml
@@ -19,7 +19,7 @@ jobs:
   ontology_qc:
     # The type of runner that the job will run on
     runs-on: ubuntu-latest
-    container: obolibrary/odkfull:v1.5
+    container: obolibrary/odkfull:v1.5.2
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
diff --git a/src/ontology/Makefile b/src/ontology/Makefile
index 86dfa09..381b01a 100644
--- a/src/ontology/Makefile
+++ b/src/ontology/Makefile
@@ -1,7 +1,7 @@
 # ----------------------------------------
 # Makefile for nmrCV
 # Generated using ontology-development-kit
-# ODK Version: v1.5
+# ODK Version: v1.5.2
 # ----------------------------------------
 # IMPORTANT: DO NOT EDIT THIS FILE. To override default make goals, use nmrCV.Makefile instead
 
@@ -45,8 +45,8 @@ REPORT_LABEL =              -l true
 REPORT_PROFILE_OPTS =       
 OBO_FORMAT_OPTIONS =        
 SPARQL_VALIDATION_CHECKS =  owldef-self-reference iri-range label-with-iri multiple-replaced_by dc-properties 
-SPARQL_EXPORTS =            basic-report edges xrefs obsoletes synonyms 
-ODK_VERSION_MAKEFILE =      v1.5
+SPARQL_EXPORTS =            basic-report class-count-by-prefix edges xrefs obsoletes synonyms 
+ODK_VERSION_MAKEFILE =      v1.5.2
 
 TODAY ?=                    $(shell date +%Y-%m-%d)
 OBODATE ?=                  $(shell date +'%d:%m:%Y %H:%M')
diff --git a/src/sparql/class-count-by-prefix.sparql b/src/sparql/class-count-by-prefix.sparql
new file mode 100644
index 0000000..a6a4851
--- /dev/null
+++ b/src/sparql/class-count-by-prefix.sparql
@@ -0,0 +1,10 @@
+prefix owl: <http://www.w3.org/2002/07/owl#>
+prefix obo: <http://purl.obolibrary.org/obo/>
+
+SELECT ?prefix (COUNT(DISTINCT ?cls) AS ?numberOfClasses) WHERE 
+{
+  ?cls a owl:Class .
+  FILTER (!isBlank(?cls))
+  BIND( STRBEFORE(STRAFTER(str(?cls),"http://purl.obolibrary.org/obo/"), "_") AS ?prefix)
+}
+GROUP BY ?prefix
\ No newline at end of file