diff --git a/ProPublicaCongressAPI.Contracts/RecentBill.cs b/ProPublicaCongressAPI.Contracts/RecentBill.cs
index e51efa0..8d13b10 100644
--- a/ProPublicaCongressAPI.Contracts/RecentBill.cs
+++ b/ProPublicaCongressAPI.Contracts/RecentBill.cs
@@ -6,6 +6,8 @@ public class RecentBill
     {
         public string BillId { get; set; }
 
+        public string BillSlug { get; set; }
+
         public string BillType { get; set; }
 
         public string BillNumber { get; set; }
diff --git a/ProPublicaCongressAPI.Contracts/SpecificBill.cs b/ProPublicaCongressAPI.Contracts/SpecificBill.cs
index 8debc3a..49c08dc 100644
--- a/ProPublicaCongressAPI.Contracts/SpecificBill.cs
+++ b/ProPublicaCongressAPI.Contracts/SpecificBill.cs
@@ -5,7 +5,8 @@ namespace ProPublicaCongressAPI.Contracts
 {
     public class SpecificBill
     {
-        public string BillId { get; set; }
+        public string BillId { get; set; }
+        public string BillSlug { get; set; }
         public int Congress { get; set; }
         public string BillNumber { get; set; }
         public string BillType { get; set; }
diff --git a/ProPublicaCongressAPI/InternalModels/RecentBill.cs b/ProPublicaCongressAPI/InternalModels/RecentBill.cs
index e50b7da..8c9ebc3 100644
--- a/ProPublicaCongressAPI/InternalModels/RecentBill.cs
+++ b/ProPublicaCongressAPI/InternalModels/RecentBill.cs
@@ -7,6 +7,9 @@ internal class RecentBill
         [JsonProperty("bill_id")]
         public string BillId { get; set; }
 
+        [JsonProperty("bill_slug")]
+        public string BillSlug { get; set; }
+
         [JsonProperty("bill_type")]
         public string BillType { get; set; }
 
diff --git a/ProPublicaCongressAPI/InternalModels/SpecificBill.cs b/ProPublicaCongressAPI/InternalModels/SpecificBill.cs
index 221dc6a..2d9b887 100644
--- a/ProPublicaCongressAPI/InternalModels/SpecificBill.cs
+++ b/ProPublicaCongressAPI/InternalModels/SpecificBill.cs
@@ -8,6 +8,9 @@ internal class SpecificBill
         [JsonProperty("bill_id")]
         public string BillId { get; set; }
 
+        [JsonProperty("bill_slug")]
+        public string BillSlug { get; set; }
+
         [JsonProperty("datetime")]
         public int Congress { get; set; }