diff --git a/src/main/java/gov/usgs/earthquake/nshmp/gmm/AbrahamsonGulerce_2020.java b/src/main/java/gov/usgs/earthquake/nshmp/gmm/AbrahamsonGulerce_2020.java
index f46395255da7dec037316975d8b6564cf098a0d9..7cf2c8707af4251ac088e3151ec83d2fc3abda03 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/gmm/AbrahamsonGulerce_2020.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/gmm/AbrahamsonGulerce_2020.java
@@ -122,10 +122,15 @@ public abstract class AbrahamsonGulerce_2020 implements GroundMotionModel {
       .set(VS30, Range.closed(150.0, 1000.0))
       .build();
 
-  static final CoefficientContainer COEFFS = new CoefficientContainer("AG20.csv");
-  static final CoefficientContainer COEFFS_PRVI = new CoefficientContainer("AG20_PRVI.csv");
-  static final CoefficientContainer COEFFS_AK_ADJUSTED =
-      new CoefficientContainer("nga-sub-ak-interface-adjustment.csv");
+  static final CoefficientContainer COEFFS;
+  static final CoefficientContainer COEFFS_PRVI;
+  static final CoefficientContainer COEFFS_AK_ADJUSTED;
+
+  static {
+    COEFFS = new CoefficientContainer("AG20.csv");
+    COEFFS_PRVI = new CoefficientContainer("AG20_PRVI.csv");
+    COEFFS_AK_ADJUSTED = new CoefficientContainer("nga-sub-ak-interface-adjustment.csv");
+  }
 
   private static final double C1S = 7.5;
   private static final double C4 = 10.0;
diff --git a/src/main/java/gov/usgs/earthquake/nshmp/gmm/KuehnEtAl_2020.java b/src/main/java/gov/usgs/earthquake/nshmp/gmm/KuehnEtAl_2020.java
index e3a7445338d98f2b56f395ae605a3794a1e24f87..f0ded92f3abf33ec283a2acef10b30352f9578c8 100644
--- a/src/main/java/gov/usgs/earthquake/nshmp/gmm/KuehnEtAl_2020.java
+++ b/src/main/java/gov/usgs/earthquake/nshmp/gmm/KuehnEtAl_2020.java
@@ -145,10 +145,15 @@ public abstract class KuehnEtAl_2020 implements GroundMotionModel {
       .set(VS30, Range.closed(150.0, 1500.0))
       .build();
 
-  static final CoefficientContainer COEFFS = new CoefficientContainer("KBCG20.csv");
-  static final CoefficientContainer COEFFS_PRVI = new CoefficientContainer("KBCG20_PRVI.csv");
-  static final CoefficientContainer COEFFS_AK_ADJUSTED =
-      new CoefficientContainer("nga-sub-ak-interface-adjustment.csv");
+  static final CoefficientContainer COEFFS;
+  static final CoefficientContainer COEFFS_PRVI;
+  static final CoefficientContainer COEFFS_AK_ADJUSTED;
+
+  static {
+    COEFFS = new CoefficientContainer("KBCG20.csv");
+    COEFFS_PRVI = new CoefficientContainer("KBCG20_PRVI.csv");
+    COEFFS_AK_ADJUSTED = new CoefficientContainer("nga-sub-ak-interface-adjustment.csv");
+  }
 
   private static final double δM = 0.1; // p. 20
   private static final double MREF = 6.0; // p. 20