diff --git a/imag-store/src/create.rs b/imag-store/src/create.rs
index 9d90f642..9921bb05 100644
--- a/imag-store/src/create.rs
+++ b/imag-store/src/create.rs
@@ -32,7 +32,7 @@ pub fn create(rt: &Runtime) {
             let path = scmd.value_of("path").or_else(|| scmd.value_of("id"));
             if path.is_none() {
                 warn!("No ID / Path provided. Exiting now");
-                write!(stderr(), "No ID / Path provided. Exiting now");
+                write!(stderr(), "No ID / Path provided. Exiting now").ok();
                 exit(1);
             }
 
@@ -101,14 +101,15 @@ fn create_from_source(rt: &Runtime, matches: &ArgMatches, path: &PathBuf) -> Res
     debug!("Content with len = {}", content.len());
 
     Entry::from_str(path.clone(), &content[..])
-        .map(|mut new_e| {
-            rt.store()
+        .and_then(|new_e| {
+            let r = rt.store()
                 .create(path.clone())
                 .map(|mut old_e| {
                     *old_e.deref_mut() = new_e;
                 });
 
             debug!("Entry build");
+            r
         })
         .map_err(|serr| StoreError::new(StoreErrorKind::BackendError, Some(Box::new(serr))))
 }
@@ -144,7 +145,7 @@ fn string_from_raw_src(raw_src: &str) -> String {
         debug!("Read {:?} bytes", res);
     } else {
         debug!("Reading entry from file at {:?}", raw_src);
-        OpenOptions::new()
+        let _ = OpenOptions::new()
             .read(true)
             .write(false)
             .create(false)
diff --git a/imag-store/src/delete.rs b/imag-store/src/delete.rs
index 71bf0f91..5386903e 100644
--- a/imag-store/src/delete.rs
+++ b/imag-store/src/delete.rs
@@ -1,5 +1,3 @@
-use std::path::PathBuf;
-
 use libimagstore::storeid::build_entry_path;
 use libimagrt::runtime::Runtime;
 use libimagutil::trace::trace_error;
diff --git a/imag-store/src/main.rs b/imag-store/src/main.rs
index 4b5968d7..679390e3 100644
--- a/imag-store/src/main.rs
+++ b/imag-store/src/main.rs
@@ -1,3 +1,18 @@
+#![deny(
+    non_camel_case_types,
+    non_snake_case,
+    path_statements,
+    trivial_numeric_casts,
+    unstable_features,
+    unused_allocation,
+    unused_import_braces,
+    unused_imports,
+    unused_must_use,
+    unused_mut,
+    unused_qualifications,
+    while_true,
+)]
+
 extern crate clap;
 #[macro_use] extern crate log;
 extern crate semver;
diff --git a/imag-store/src/retrieve.rs b/imag-store/src/retrieve.rs
index cc43ece2..0a49b164 100644
--- a/imag-store/src/retrieve.rs
+++ b/imag-store/src/retrieve.rs
@@ -1,6 +1,4 @@
-use std::path::PathBuf;
 use std::ops::Deref;
-use std::fmt::Display;
 use std::process::exit;
 
 use clap::ArgMatches;
diff --git a/imag-store/src/update.rs b/imag-store/src/update.rs
index d37da1c2..287624c5 100644
--- a/imag-store/src/update.rs
+++ b/imag-store/src/update.rs
@@ -1,4 +1,3 @@
-use std::path::PathBuf;
 use std::ops::DerefMut;
 use std::process::exit;
 
diff --git a/imag-store/src/util.rs b/imag-store/src/util.rs
index 61832e3a..f14d462b 100644
--- a/imag-store/src/util.rs
+++ b/imag-store/src/util.rs
@@ -1,16 +1,13 @@
 use std::collections::BTreeMap;
-use std::path::PathBuf;
 use std::str::Split;
 
 use clap::ArgMatches;
-use semver::Version;
 use toml::Value;
 
 use libimagstore::store::EntryHeader;
-use libimagrt::runtime::Runtime;
 use libimagutil::key_value_split::IntoKeyValue;
 
-pub fn build_toml_header(matches: &ArgMatches, mut header: EntryHeader) -> EntryHeader {
+pub fn build_toml_header(matches: &ArgMatches, header: EntryHeader) -> EntryHeader {
     debug!("Building header from cli spec");
     if let Some(headerspecs) = matches.values_of("header") {
         let mut main = header.into();