diff --git a/data/personen/aschwin-marsman.json b/data/personen/aschwin-marsman.json
index 8c0e0f2..3641862 100644
--- a/data/personen/aschwin-marsman.json
+++ b/data/personen/aschwin-marsman.json
@@ -1,4 +1,5 @@
 {
+  "id": "aschwin-marsman",
   "name": "Aschwin Marsman",
   "email": "",
   "gender": "male",
diff --git a/data/personen/mischa-peters.json b/data/personen/mischa-peters.json
index eb65f84..855cf56 100644
--- a/data/personen/mischa-peters.json
+++ b/data/personen/mischa-peters.json
@@ -1,4 +1,5 @@
 {
+  "id": "mischa-peters",
   "name": "Mischa Peters",
   "email": "",
   "gender": "male",
@@ -7,7 +8,7 @@
   "thumbnail": "/afbeeldingen/personen/mischa-peters-200x200.jpg",
   "social": {
     "github": "https://github.com/mischapeters",
-    "twitter": "",
+    "twitter": "mischapeters",
     "instagram": "",
     "linkedin": "https://www.linkedin.com/in/mischapeters/",
     "mastodon": "mischa@exquisite.social",
diff --git a/data/personen/rogier-spoor.json b/data/personen/rogier-spoor.json
index 9896414..6b77e6e 100644
--- a/data/personen/rogier-spoor.json
+++ b/data/personen/rogier-spoor.json
@@ -1,4 +1,5 @@
 {
+  "id": "rogier-spoor",
   "name": "Rogier Spoor",
   "email": "",
   "gender": "male",
diff --git a/data/personen/willem-toorop.json b/data/personen/willem-toorop.json
index efe4aec..1d11288 100644
--- a/data/personen/willem-toorop.json
+++ b/data/personen/willem-toorop.json
@@ -1,4 +1,5 @@
 {
+  "id": "willem-toorop",
   "name": "Willem Toorop",
   "email": "",
   "gender": "male",