diff --git a/src/util/config.rs b/src/util/config.rs
index c47742b..1aa5457 100644
--- a/src/util/config.rs
+++ b/src/util/config.rs
@@ -5,39 +5,39 @@ use serde_yaml::{self};
 
 #[derive(Debug, Deserialize)]
 pub struct Config {
-    pub tested_executables: Vec<Team>,
+    tested_executables: Vec<Team>,
 
-    pub input_path: PathBuf,
-    pub output_path: PathBuf,
-    pub in_stream_path: PathBuf,
+    input_path: PathBuf,
+    output_path: PathBuf,
+    in_stream_path: PathBuf,
 
-    pub runtimes: Option<Vec<Team>>,
+    runtimes: Option<Vec<Team>>,
 
-    pub toolchains: Vec<Toolchain>,
+    toolchains: Vec<Toolchain>,
 }
 
 #[derive(Debug, Deserialize)]
 pub struct Team {
-    pub name: String,
-    pub executable: PathBuf,
+    name: String,
+    executable: PathBuf,
 }
 
 #[derive(Debug, Deserialize)]
 pub struct Toolchain {
-    pub name: String,
-    pub steps: Vec<Step>,}
+    name: String,
+    steps: Vec<Step>,}
 
 #[derive(Debug, Deserialize)]
 pub struct Step {
-    pub name: String,
+    name: String,
 
-    pub executable_path: Option<PathBuf>, // if None then we use the current executable path
-    pub arguments: Vec<String>, // special string $INPUT corresponds to previous step output
-    pub output: String, // the output file name
+    executable_path: Option<PathBuf>, // if None then we use the current executable path
+    arguments: Vec<String>, // special string $INPUT corresponds to previous step output
+    output: String, // the output file name
 
-    pub uses_runtime: Option<bool>,
-    pub uses_in_stream: Option<bool>,
-    pub allow_error: Option<bool>
+    uses_runtime: Option<bool>,
+    uses_in_stream: Option<bool>,
+    allow_error: Option<bool>
 }
 
 pub fn parse_config(path: PathBuf) -> Config {