diff --git a/Cargo.toml b/Cargo.toml
index 4165322..7d7b15c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ lazy_static = { version = "1.2.0", optional = true }
 log = "0.4"
 mime = "0.3.14"
 mime_guess = "2.0.1"
-rand = "0.7"
+rand = "0.8"
 safemem = { version = "0.3", optional = true }
 tempfile = "3"
 clippy = { version = ">=0.0, <0.1", optional = true}
@@ -36,14 +36,14 @@ quick-error = { version = "1.2", optional = true }
 # Optional Integrations
 hyper = { version = ">=0.9, <0.11", optional = true, default-features = false }
 iron = { version = ">=0.4,<0.7", optional = true }
-tiny_http = { version = "0.6", optional = true }
+tiny_http = { version = "0.8", optional = true }
 nickel = { version = ">=0.10.1", optional = true }
 
 # Only for Rocket example but dev-dependencies can't be optional
 rocket = { version = "0.4", optional = true }
 
 [dev-dependencies]
-env_logger = "0.5"
+env_logger = "0.8"
 
 [features]
 client = []
diff --git a/src/lib.rs b/src/lib.rs
index 7ab4a5b..ce0dd7c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -121,6 +121,7 @@ fn random_alphanumeric(len: usize) -> String {
     rand::thread_rng()
         .sample_iter(&rand::distributions::Alphanumeric)
         .take(len)
+        .map(|ch| ch as char)
         .collect()
 }
 
diff --git a/src/mock.rs b/src/mock.rs
index 7d58905..2947661 100644
--- a/src/mock.rs
+++ b/src/mock.rs
@@ -92,7 +92,7 @@ impl Write for HttpBuffer {
         }
 
         // Simulate the randomness of a network connection by not always reading everything
-        let len = self.rng.gen_range(1, buf.len() + 1);
+        let len = self.rng.gen_range(1..=buf.len());
 
         self.buf.write(&buf[..len])
     }
@@ -159,7 +159,7 @@ impl<'a> Read for ServerRequest<'a> {
         }
 
         // Simulate the randomness of a network connection by not always reading everything
-        let len = self.rng.gen_range(1, out.len() + 1);
+        let len = self.rng.gen_range(1..=out.len());
         self.data.read(&mut out[..len])
     }
 }