diff --git a/src/executor.rs b/src/executor.rs
index a13739d..4f05ffa 100644
--- a/src/executor.rs
+++ b/src/executor.rs
@@ -20,6 +20,7 @@ impl DefaultExecutor {
 
         let child = Command::new(command[0].clone())
             .args(&command[1..])
+            .stdin(Stdio::piped())
             .stdout(Stdio::piped())
             .stderr(Stdio::piped())
             .spawn()
diff --git a/src/options.rs b/src/options.rs
index 0f16d4d..e02852d 100644
--- a/src/options.rs
+++ b/src/options.rs
@@ -48,15 +48,15 @@ impl Default for AnsibleConnectionOptions {
 }
 
 impl AnsibleConnectionOptions {
-    const ASK_PASS_FLAG: &str = "--ask-pass";
-    const CONNECTION_FLAG: &str = "--connection";
-    const PRIVATE_KEY_FLAG: &str = "--private-key";
-    const SCP_EXTRA_ARGS_FLAG: &str = "--scp-extra-args";
-    const SFTP_EXTRA_ARGS_FLAG: &str = "--sftp-extra-args";
-    const SSH_COMMON_ARGS_FLAG: &str = "--ssh-common-args";
-    const SSH_EXTRA_ARGS_FLAG: &str = "--ssh-extra-args";
-    const TIMEOUT_FLAG: &str = "--timeout";
-    const USER_FLAG: &str = "--user";
+    const ASK_PASS_FLAG: &'static str = "--ask-pass";
+    const CONNECTION_FLAG: &'static str = "--connection";
+    const PRIVATE_KEY_FLAG: &'static str = "--private-key";
+    const SCP_EXTRA_ARGS_FLAG: &'static str = "--scp-extra-args";
+    const SFTP_EXTRA_ARGS_FLAG: &'static str = "--sftp-extra-args";
+    const SSH_COMMON_ARGS_FLAG: &'static str = "--ssh-common-args";
+    const SSH_EXTRA_ARGS_FLAG: &'static str = "--ssh-extra-args";
+    const TIMEOUT_FLAG: &'static str = "--timeout";
+    const USER_FLAG: &'static str = "--user";
 
     /// Returns a list of connection options flags to be used on
     /// ansible-playbook execution
@@ -146,10 +146,10 @@ pub struct AnsiblePrivilegeEscalationOptions {
 }
 
 impl AnsiblePrivilegeEscalationOptions {
-    const ASK_BECOME_PASS_FLAG: &str = "--ask-become-pass";
-    const BECOME_FLAG: &str = "--become";
-    const BECOME_METHOD_FLAG: &str = "--become-method";
-    const BECOME_USER_FLAG: &str = "--become-user";
+    const ASK_BECOME_PASS_FLAG: &'static str = "--ask-become-pass";
+    const BECOME_FLAG: &'static str = "--become";
+    const BECOME_METHOD_FLAG: &'static str = "--become-method";
+    const BECOME_USER_FLAG: &'static str = "--become-user";
 
     /// returns a list of privilege escalation options flags to be used on
     /// ansible-playbook execution
diff --git a/src/playbook.rs b/src/playbook.rs
index b2f9b20..3cfb588 100644
--- a/src/playbook.rs
+++ b/src/playbook.rs
@@ -73,32 +73,32 @@ impl Default for AnsiblePlaybookOptions {
 }
 
 impl AnsiblePlaybookOptions {
-    const ASK_VAULT_PASSWORD_FLAG: &str = "--ask-vault-password";
-    const CHECK_FLAG: &str = "--check";
-    const DIFF_FLAG: &str = "--diff";
-    const EXTRA_VARS_FLAG: &str = "--extra-vars";
-    const FLUSH_CACHE_FLAG: &str = "--flush-cache";
-    const FORCE_HANDLERS_FLAG: &str = "--force-handlers";
-    const FORKS_FLAG: &str = "--forks";
-    const INVENTORY_FLAG: &str = "--inventory";
-    const LIMIT_FLAG: &str = "--limit";
-    const LIST_HOSTS_FLAG: &str = "--list-hosts";
-    const LIST_TAGS_FLAG: &str = "--list-tags";
-    const LIST_TASKS_FLAG: &str = "--list-tasks";
-    const MODULE_PATH_FLAG: &str = "--module-path";
-    const SKIP_TAGS_FLAG: &str = "--skip-tags";
-    const START_AT_TASK_FLAG: &str = "--start-at-task";
-    const STEP_FLAG: &str = "--step";
-    const SYNTAX_CHECK_FLAG: &str = "--syntax-check";
-    const TAGS_FLAG: &str = "--tags";
-    const VAULT_ID_FLAG: &str = "--vault-id";
-    const VAULT_PASSWORD_FILE_FLAG: &str = "--vault-password-file";
-    const VERSION_FLAG: &str = "--version";
-    const VERBOSE_FLAG: &str = "-vvvv";
-    const VERBOSE_V_FLAG: &str = "-v";
-    const VERBOSE_VV_FLAG: &str = "-vv";
-    const VERBOSE_VVV_FLAG: &str = "-vvv";
-    const VERBOSE_VVVV_FLAG: &str = "-vvvv";
+    const ASK_VAULT_PASSWORD_FLAG: &'static str = "--ask-vault-password";
+    const CHECK_FLAG: &'static str = "--check";
+    const DIFF_FLAG: &'static str = "--diff";
+    const EXTRA_VARS_FLAG: &'static str = "--extra-vars";
+    const FLUSH_CACHE_FLAG: &'static str = "--flush-cache";
+    const FORCE_HANDLERS_FLAG: &'static str = "--force-handlers";
+    const FORKS_FLAG: &'static str = "--forks";
+    const INVENTORY_FLAG: &'static str = "--inventory";
+    const LIMIT_FLAG: &'static str = "--limit";
+    const LIST_HOSTS_FLAG: &'static str = "--list-hosts";
+    const LIST_TAGS_FLAG: &'static str = "--list-tags";
+    const LIST_TASKS_FLAG: &'static str = "--list-tasks";
+    const MODULE_PATH_FLAG: &'static str = "--module-path";
+    const SKIP_TAGS_FLAG: &'static str = "--skip-tags";
+    const START_AT_TASK_FLAG: &'static str = "--start-at-task";
+    const STEP_FLAG: &'static str = "--step";
+    const SYNTAX_CHECK_FLAG: &'static str = "--syntax-check";
+    const TAGS_FLAG: &'static str = "--tags";
+    const VAULT_ID_FLAG: &'static str = "--vault-id";
+    const VAULT_PASSWORD_FILE_FLAG: &'static str = "--vault-password-file";
+    const VERSION_FLAG: &'static str = "--version";
+    const VERBOSE_FLAG: &'static str = "-vvvv";
+    const VERBOSE_V_FLAG: &'static str = "-v";
+    const VERBOSE_VV_FLAG: &'static str = "-vv";
+    const VERBOSE_VVV_FLAG: &'static str = "-vvv";
+    const VERBOSE_VVVV_FLAG: &'static str = "-vvvv";
 
     fn gen_verbosity(&self) -> &str {
         if self.verbose {