diff --git a/_data/en-us/b.yml b/_data/en-us/b.yml
index d0f279c..181391a 100644
--- a/_data/en-us/b.yml
+++ b/_data/en-us/b.yml
@@ -37,7 +37,7 @@
 - title: Botnet
   tags:
     - Concept
-    - Cyber security
+    - Cybersecurity
   description:
     "A botnet is a network of internet-connected devices infected with
     malware (malware is a malicious program that affects a device), allowing cybercriminals
diff --git a/_data/en-us/d.yml b/_data/en-us/d.yml
index 571f7c4..709e3fa 100644
--- a/_data/en-us/d.yml
+++ b/_data/en-us/d.yml
@@ -31,7 +31,7 @@
 - title: DDoS
   tags:
     - Concept
-    - Cyber security
+    - Cybersecurity
   description:
     DDoS is an attack where many devices try to connect to a website at
     the same time to overload it.
@@ -139,7 +139,7 @@
 - title: DoS
   tags:
     - Concept
-    - Cyber security
+    - Cybersecurity
   description:
     DoS is a denial of service attack. In this attack a single computer
     is used to make many queries to a website in a short space of time with the aim