diff --git a/src/main/java/gov/usgs/earthquake/nshmp/www/gmm/GmmCalc.java b/src/main/java/gov/usgs/earthquake/nshmp/www/gmm/GmmCalc.java
index a55b1621cad32708db6d868f3309dc7344e3a9d9..d3363524df9ab03544f70a92af12875cf5de67c7 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/www/gmm/GmmCalc.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/www/gmm/GmmCalc.java
@@ -53,8 +53,8 @@ class GmmCalc {
           .collect(Collectors.toList());
 
       List<Double> saPeriods = saImts.stream()
-        .map(imt -> imt.period())
-        .collect(Collectors.toList());
+          .map(imt -> imt.period())
+          .collect(Collectors.toList());
 
       gmmSpectra.put(
           gmm,