diff --git a/recipes/hmftools-redux/meta.yaml b/recipes/hmftools-redux/meta.yaml
index e11d880a8342c..8d940a51d025b 100644
--- a/recipes/hmftools-redux/meta.yaml
+++ b/recipes/hmftools-redux/meta.yaml
@@ -12,13 +12,13 @@ source:
 
 build:
   noarch: generic
-  number: 5
+  number: 6
   run_exports:
     - {{ pin_subpackage('hmftools-redux', max_pin="x.x") }}
 
 requirements:
   run:
-    - openjdk >=8
+    - openjdk >=8,<=21
     - sambamba >=1.0.1
 
 test: