diff --git a/src/main/java/com/conveyal/datatools/manager/jobs/PeliasUpdateJob.java b/src/main/java/com/conveyal/datatools/manager/jobs/PeliasUpdateJob.java
index 964f75fed..375a051a3 100644
--- a/src/main/java/com/conveyal/datatools/manager/jobs/PeliasUpdateJob.java
+++ b/src/main/java/com/conveyal/datatools/manager/jobs/PeliasUpdateJob.java
@@ -142,6 +142,7 @@ private String makeWebhookRequest() {
         PeliasWebhookRequestBody peliasWebhookRequestBody = new PeliasWebhookRequestBody();
         peliasWebhookRequestBody.gtfsFeeds = gtfsFeeds;
         peliasWebhookRequestBody.csvFiles = deployment.peliasCsvFiles;
+        peliasWebhookRequestBody.peliasSynonymsBase64 = deployment.peliasSynonymsBase64;
         peliasWebhookRequestBody.logUploadUrl = logUploadS3URI.toString();
         peliasWebhookRequestBody.deploymentId = deployment.id;
         peliasWebhookRequestBody.resetDb = deployment.peliasResetDb;
@@ -218,6 +219,8 @@ private static class PeliasWebhookRequestBody {
         public String logUploadUrl;
         public String deploymentId;
         public boolean resetDb;
+
+        public String peliasSynonymsBase64;
     }
 
     /**
diff --git a/src/main/java/com/conveyal/datatools/manager/models/Deployment.java b/src/main/java/com/conveyal/datatools/manager/models/Deployment.java
index a910c31b4..b43092f87 100644
--- a/src/main/java/com/conveyal/datatools/manager/models/Deployment.java
+++ b/src/main/java/com/conveyal/datatools/manager/models/Deployment.java
@@ -81,6 +81,8 @@ public class Deployment extends Model implements Serializable {
     public boolean peliasResetDb;
     public List<String> peliasCsvFiles = new ArrayList<>();
 
+    public String peliasSynonymsBase64;
+
     /**
      * Get parent project for deployment. Note: at one point this was a JSON property of this class, but severe
      * performance issues prevent this field from scaling to be fetched/assigned to a large collection of deployments.