diff --git a/_data/categories.yml b/_data/categories.yml
index a0bce09..046f6ff 100644
--- a/_data/categories.yml
+++ b/_data/categories.yml
@@ -2,3 +2,7 @@
   name: Minimalism
 - slug: arch-spin
   name: Arch spin
+- slug: android
+  name: Android
+- slug: security
+  name: Security
diff --git a/categories/android.html b/categories/android.html
new file mode 100644
index 0000000..566845a
--- /dev/null
+++ b/categories/android.html
@@ -0,0 +1,5 @@
+---
+layout: category
+category: android
+permalink: /categories/android/
+---
diff --git a/categories/security.html b/categories/security.html
new file mode 100644
index 0000000..67447be
--- /dev/null
+++ b/categories/security.html
@@ -0,0 +1,5 @@
+---
+layout: category
+category: security
+permalink: /categories/security/
+---