diff --git a/Cargo.toml b/Cargo.toml
index cfa706a4f..06e17213f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -53,7 +53,7 @@ lru = "0.6"
 winapi = "0.3"
 
 [dev-dependencies]
-rand = "0.7"
+rand = "0.8"
 maplit = "1"
 matches = "0.1.8"
 proptest = "0.10"
diff --git a/src/functional_test.rs b/src/functional_test.rs
index ecd30beae..7e188738b 100644
--- a/src/functional_test.rs
+++ b/src/functional_test.rs
@@ -31,7 +31,7 @@ fn test_indexing() {
     let mut uncommitted_docs: HashSet<u64> = HashSet::new();
 
     for _ in 0..200 {
-        let random_val = rng.gen_range(0, 20);
+        let random_val = rng.gen_range(0..20);
         if random_val == 0 {
             index_writer.commit().expect("Commit failed");
             committed_docs.extend(&uncommitted_docs);
diff --git a/src/query/term_query/term_scorer.rs b/src/query/term_query/term_scorer.rs
index 86552026e..afbdce5aa 100644
--- a/src/query/term_query/term_scorer.rs
+++ b/src/query/term_query/term_scorer.rs
@@ -302,7 +302,7 @@ mod tests {
         let mut rng = rand::thread_rng();
         writer.set_merge_policy(Box::new(NoMergePolicy));
         for _ in 0..3_000 {
-            let term_freq = rng.gen_range(1, 10000);
+            let term_freq = rng.gen_range(1..10000);
             let words: Vec<&str> = std::iter::repeat("bbbb").take(term_freq).collect();
             let text = words.join(" ");
             writer.add_document(doc!(text_field=>text));