diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0dd1bb3..fdfee28 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.5.1 (Pre-release)
+
+- Fix bug where slug max length was too short for titles.
+
 ## 0.5.0 (Pre-release)
 
 - Show pīkau titles on pathway diagram when required. (fixes #49)
diff --git a/config/__init__.py b/config/__init__.py
index ffd7a5a..106cd83 100644
--- a/config/__init__.py
+++ b/config/__init__.py
@@ -1,3 +1,3 @@
 """Module for Django system configuration."""
 
-__version__ = "0.5.0"
+__version__ = "0.5.1"
diff --git a/pikau/migrations/0030_auto_20180529_0956.py b/pikau/migrations/0030_auto_20180529_0956.py
new file mode 100644
index 0000000..b5766d6
--- /dev/null
+++ b/pikau/migrations/0030_auto_20180529_0956.py
@@ -0,0 +1,38 @@
+# Generated by Django 2.0.5 on 2018-05-28 21:56
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pikau', '0029_auto_20180529_0726'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='glossaryterm',
+            name='slug',
+            field=models.SlugField(help_text='A unique readable identifier', max_length=200, unique=True),
+        ),
+        migrations.AlterField(
+            model_name='goal',
+            name='slug',
+            field=models.SlugField(max_length=200, unique=True),
+        ),
+        migrations.AlterField(
+            model_name='pikaucourse',
+            name='slug',
+            field=models.SlugField(max_length=200, unique=True),
+        ),
+        migrations.AlterField(
+            model_name='pikauunit',
+            name='slug',
+            field=models.SlugField(max_length=200),
+        ),
+        migrations.AlterField(
+            model_name='tag',
+            name='slug',
+            field=models.SlugField(max_length=200, unique=True),
+        ),
+    ]
diff --git a/pikau/models.py b/pikau/models.py
index 28c9c4c..8342ccd 100644
--- a/pikau/models.py
+++ b/pikau/models.py
@@ -48,6 +48,7 @@ class GlossaryTerm(models.Model):
     #  Auto-incrementing 'id' field is automatically set by Django
     slug = models.SlugField(
         unique=True,
+        max_length=200,
         help_text="A unique readable identifier",
     )
     term = models.CharField(max_length=200, unique=True)
@@ -99,7 +100,7 @@ class Goal(models.Model):
     """Model for goal."""
 
     #  Auto-incrementing 'id' field is automatically set by Django
-    slug = models.SlugField(unique=True)
+    slug = models.SlugField(unique=True, max_length=200)
     description = models.CharField(max_length=500, unique=True)
 
     def __str__(self):
@@ -115,7 +116,7 @@ class Tag(models.Model):
     """Model for tag."""
 
     #  Auto-incrementing 'id' field is automatically set by Django
-    slug = models.SlugField(unique=True)
+    slug = models.SlugField(unique=True, max_length=200)
     name = models.CharField(max_length=100, unique=True)
     description = models.CharField(max_length=300, blank=True)
 
@@ -191,7 +192,7 @@ class PikauCourse(models.Model):
     """Model for Pikau Course."""
 
     #  Auto-incrementing 'id' field is automatically set by Django
-    slug = models.SlugField(unique=True)
+    slug = models.SlugField(unique=True, max_length=200)
     name = models.CharField(max_length=200, unique=True)
     language = models.CharField(max_length=20, choices=LANGUAGE_CHOICES)
     readiness_level = models.IntegerField(
@@ -291,7 +292,7 @@ def __str__(self):
 class PikauUnit(models.Model):
     """Model for Pikau Unit."""
 
-    slug = models.SlugField()
+    slug = models.SlugField(max_length=200)
     number = models.PositiveSmallIntegerField()
     pikau_course = models.ForeignKey(
         PikauCourse,