diff --git a/clusters/mitre-ics-assets.json b/clusters/mitre-ics-assets.json
index 9310e54..add2b24 100644
--- a/clusters/mitre-ics-assets.json
+++ b/clusters/mitre-ics-assets.json
@@ -108,7 +108,7 @@
           "User Execution https://collaborate.mitre.org/attackics/index.php/Technique/T863",
           "Valid Accounts https://collaborate.mitre.org/attackics/index.php/Technique/T859"
         ],
-        "refss": [
+        "refs": [
           "https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-82r2.pdf"
         ]
       },
@@ -167,7 +167,7 @@
           "Utilize/Change Operating Mode https://collaborate.mitre.org/attackics/index.php/Technique/T858",
           "Valid Accounts https://collaborate.mitre.org/attackics/index.php/Technique/T859"
         ],
-        "refss": [
+        "refs": [
           "https://ics-cert.us-cert.gov/Secure-Architecture-Design-Definitions",
           "http://isa99.isa.org/ISA99%20Wiki/WP-2-1.aspx",
           "https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-82r2.pdf"
@@ -216,7 +216,7 @@
           "User Execution https://collaborate.mitre.org/attackics/index.php/Technique/T863",
           "Valid Accounts https://collaborate.mitre.org/attackics/index.php/Technique/T859"
         ],
-        "refss": [
+        "refs": [
           "https://ics-cert.us-cert.gov/Secure-Architecture-Design-Definitions",
           "http://isa99.isa.org/ISA99%20Wiki/WP-2-1.aspx"
         ]
@@ -238,7 +238,7 @@
           "System Firmware https://collaborate.mitre.org/attackics/index.php/Technique/T857",
           "Valid Accounts https://collaborate.mitre.org/attackics/index.php/Technique/T859"
         ],
-        "refss": [
+        "refs": [
           "https://ics-cert.us-cert.gov/Secure-Architecture-Design-Definitions"
         ]
       },
@@ -274,7 +274,7 @@
           "Utilize/Change Operating Mode https://collaborate.mitre.org/attackics/index.php/Technique/T858",
           "Valid Accounts https://collaborate.mitre.org/attackics/index.php/Technique/T859 "
         ],
-        "refss": [
+        "refs": [
           "http://sache.org/beacon/files/2009/07/en/read/2009-07-Beacon-s.pdf",
           "http://www.gegridsolutions.com/multilin/notes/artsci/artsci.pdf"
         ]