diff --git a/pom.xml b/pom.xml
index bec80e21d..fff59653c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -272,7 +272,7 @@
             <groupId>com.github.conveyal</groupId>
             <artifactId>gtfs-lib</artifactId>
             <!-- Latest dev build on jitpack.io -->
-            <version>9bc752d3ef</version>
+            <version>b657dfe7d7</version>
             <!-- Exclusions added in order to silence SLF4J warnings about multiple bindings:
                 http://www.slf4j.org/codes.html#multiple_bindings
             -->
diff --git a/src/main/java/com/conveyal/datatools/editor/controllers/api/EditorController.java b/src/main/java/com/conveyal/datatools/editor/controllers/api/EditorController.java
index bd50dff8f..671466860 100644
--- a/src/main/java/com/conveyal/datatools/editor/controllers/api/EditorController.java
+++ b/src/main/java/com/conveyal/datatools/editor/controllers/api/EditorController.java
@@ -313,7 +313,7 @@ private String cascadeDeleteStop(Request req, Response res) {
                         int stopSequence = patternStop.getValue();
                         // Begin with the stop prior to the one deleted, unless at the beginning.
                         int beginWithSequence = (stopSequence != 0) ? stopSequence - 1 : stopSequence;
-                        tableWriter.normalizeStopTimesForPattern(patternStop.getKey(), beginWithSequence);
+                        tableWriter.normalizeStopTimesForPattern(patternStop.getKey(), beginWithSequence, false);
                     }
                 }
             }
@@ -406,8 +406,9 @@ private String updateStopTimesFromPatternStops (Request req, Response res) {
         int patternId = getIdFromRequest(req);
         try {
             int beginStopSequence = Integer.parseInt(req.queryParams("stopSequence"));
+            boolean interpolateStopTimes = Boolean.parseBoolean(req.queryParams("interpolateStopTimes"));
             JdbcTableWriter tableWriter = new JdbcTableWriter(table, datasource, namespace);
-            int stopTimesUpdated = tableWriter.normalizeStopTimesForPattern(patternId, beginStopSequence);
+            int stopTimesUpdated = tableWriter.normalizeStopTimesForPattern(patternId, beginStopSequence, interpolateStopTimes);
             return SparkUtils.formatJSON("updateResult", stopTimesUpdated + " stop times updated.");
         } catch (Exception e) {
             logMessageAndHalt(req, 400, "Error normalizing stop times", e);