diff --git a/src/main/frontend/yarn.lock b/src/main/frontend/yarn.lock
index a3f4621b3..7d8e2cc23 100644
--- a/src/main/frontend/yarn.lock
+++ b/src/main/frontend/yarn.lock
@@ -1497,7 +1497,7 @@ brace-expansion@^1.1.7:
     balanced-match "^1.0.0"
     concat-map "0.0.1"
 
-braces@^3.0.2:
+braces@^3.0.3:
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/braces/-/braces-3.0.3.tgz#490332f40919452272d55a8480adc0c441358789"
   integrity sha512-yQbXgO/OSZVD2IsiLlro+7Hf6Q18EJrKSEsdoMzKePKXct3gvD8oLcOQdIzGupr5Fj+EDe8gO/lxc1BzfMpxvA==
@@ -2523,11 +2523,11 @@ merge2@^1.3.0, merge2@^1.4.1:
   integrity sha512-8q7VEgMJW4J8tcfVPy8g09NcQwZdbwFEqhe/WZkoIzjn/3TGDwtOCYtXGxA3O8tPzpczCCDgv+P2P5y00ZJOOg==
 
 micromatch@^4.0.4:
-  version "4.0.5"
-  resolved "https://registry.yarnpkg.com/micromatch/-/micromatch-4.0.5.tgz#bc8999a7cbbf77cdc89f132f6e467051b49090c6"
-  integrity sha512-DMy+ERcEW2q8Z2Po+WNXuw3c5YaUSFjAO5GsJqfEl7UjvtIuFKO6ZrKvcItdy98dwFI2N1tg3zNIdKaQT+aNdA==
+  version "4.0.8"
+  resolved "https://registry.yarnpkg.com/micromatch/-/micromatch-4.0.8.tgz#d66fa18f3a47076789320b9b1af32bd86d9fa202"
+  integrity sha512-PXwfBhYu0hBCPw8Dn0E+WDYb7af3dSLVWKi3HGv84IdF4TyFoC0ysxFd0Goxw7nSv4T/PzEJQxsYsEiFCKo2BA==
   dependencies:
-    braces "^3.0.2"
+    braces "^3.0.3"
     picomatch "^2.3.1"
 
 minimatch@^3.0.4, minimatch@^3.1.1, minimatch@^3.1.2:
diff --git a/src/main/java/io/anserini/index/IndexCollection.java b/src/main/java/io/anserini/index/IndexCollection.java
index 224283702..6a9d3d70b 100644
--- a/src/main/java/io/anserini/index/IndexCollection.java
+++ b/src/main/java/io/anserini/index/IndexCollection.java
@@ -182,7 +182,7 @@ public IndexCollection(Args args) throws Exception {
     if (args.bm25Accurate) {
       // Necessary during indexing as the norm used in BM25 is already determined at index time.
       config.setSimilarity(new AccurateBM25Similarity());
-    } if (args.impact ) {
+    } else if (args.impact ) {
       config.setSimilarity(new ImpactSimilarity());
     } else {
       config.setSimilarity(new BM25Similarity());