diff --git a/src/meta_plugin/binary.rs b/src/meta_plugin/binary.rs
index f716e94..1f7e29e 100644
--- a/src/meta_plugin/binary.rs
+++ b/src/meta_plugin/binary.rs
@@ -76,7 +76,7 @@ impl MetaPlugin for BinaryMetaPlugin {
             // Use process_metadata_outputs to handle output mapping
             if let Some(meta_data) = crate::meta_plugin::process_metadata_outputs(
                 "binary", 
-                value, 
+                serde_yaml::Value::String(value), 
                 self.base.outputs()
             ) {
                 metadata.push(meta_data);
@@ -111,7 +111,7 @@ impl MetaPlugin for BinaryMetaPlugin {
         // Use process_metadata_outputs to handle output mapping
         if let Some(meta_data) = crate::meta_plugin::process_metadata_outputs(
             "binary", 
-            value, 
+            serde_yaml::Value::String(value), 
             self.base.outputs()
         ) {
             metadata.push(meta_data);
diff --git a/src/meta_plugin/cwd.rs b/src/meta_plugin/cwd.rs
index 226832d..cec2e26 100644
--- a/src/meta_plugin/cwd.rs
+++ b/src/meta_plugin/cwd.rs
@@ -91,7 +91,7 @@ impl MetaPlugin for CwdMetaPlugin {
         // Use process_metadata_outputs to handle output mapping
         if let Some(meta_data) = crate::meta_plugin::process_metadata_outputs(
             "cwd", 
-            cwd, 
+            serde_yaml::Value::String(cwd), 
             self.base.outputs()
         ) {
             metadata.push(meta_data);
diff --git a/src/meta_plugin/keep_pid.rs b/src/meta_plugin/keep_pid.rs
index 6accc94..2e8e345 100644
--- a/src/meta_plugin/keep_pid.rs
+++ b/src/meta_plugin/keep_pid.rs
@@ -105,7 +105,7 @@ impl MetaPlugin for KeepPidMetaPlugin {
         // Use process_metadata_outputs to handle output mapping
         if let Some(meta_data) = crate::meta_plugin::process_metadata_outputs(
             "keep_pid", 
-            pid, 
+            serde_yaml::Value::String(pid), 
             &self.outputs
         ) {
             metadata.push(meta_data);
diff --git a/src/meta_plugin/magic.rs b/src/meta_plugin/magic.rs
index 247b88f..2f6b559 100644
--- a/src/meta_plugin/magic.rs
+++ b/src/meta_plugin/magic.rs
@@ -107,7 +107,7 @@ impl MagicFileMetaPlugin {
                     // Use process_metadata_outputs to handle output mapping
                     if let Some(meta_data) = crate::meta_plugin::process_metadata_outputs(
                         name, 
-                        result, 
+                        serde_yaml::Value::String(result), 
                         self.base.outputs()
                     ) {
                         metadata.push(meta_data);
diff --git a/src/meta_plugin/read_rate.rs b/src/meta_plugin/read_rate.rs
index edcb067..edd59fd 100644
--- a/src/meta_plugin/read_rate.rs
+++ b/src/meta_plugin/read_rate.rs
@@ -80,7 +80,7 @@ impl MetaPlugin for ReadRateMetaPlugin {
             // Use process_metadata_outputs to handle output mapping
             if let Some(meta_data) = crate::meta_plugin::process_metadata_outputs(
                 "read_rate", 
-                rate, 
+                serde_yaml::Value::String(rate), 
                 &self.outputs
             ) {
                 metadata.push(meta_data);
diff --git a/src/meta_plugin/read_time.rs b/src/meta_plugin/read_time.rs
index 4324283..6829768 100644
--- a/src/meta_plugin/read_time.rs
+++ b/src/meta_plugin/read_time.rs
@@ -74,7 +74,7 @@ impl MetaPlugin for ReadTimeMetaPlugin {
             // Use process_metadata_outputs to handle output mapping
             if let Some(meta_data) = crate::meta_plugin::process_metadata_outputs(
                 "read_time", 
-                duration_str, 
+                serde_yaml::Value::String(duration_str), 
                 &self.outputs
             ) {
                 metadata.push(meta_data);
diff --git a/src/meta_plugin/shell.rs b/src/meta_plugin/shell.rs
index 4ddba7d..cf5f459 100644
--- a/src/meta_plugin/shell.rs
+++ b/src/meta_plugin/shell.rs
@@ -108,7 +108,7 @@ impl MetaPlugin for ShellMetaPlugin {
         // Use process_metadata_outputs to handle output mapping
         if let Some(meta_data) = crate::meta_plugin::process_metadata_outputs(
             "shell", 
-            shell, 
+            serde_yaml::Value::String(shell), 
             &self.outputs
         ) {
             metadata.push(meta_data);
diff --git a/src/meta_plugin/shell_pid.rs b/src/meta_plugin/shell_pid.rs
index ff0c3bf..9cff819 100644
--- a/src/meta_plugin/shell_pid.rs
+++ b/src/meta_plugin/shell_pid.rs
@@ -109,7 +109,7 @@ impl MetaPlugin for ShellPidMetaPlugin {
         // Use process_metadata_outputs to handle output mapping
         if let Some(meta_data) = crate::meta_plugin::process_metadata_outputs(
             "shell_pid", 
-            pid, 
+            serde_yaml::Value::String(pid), 
             &self.outputs
         ) {
             metadata.push(meta_data);
diff --git a/src/meta_plugin/user.rs b/src/meta_plugin/user.rs
index f2e9f59..7ef4390 100644
--- a/src/meta_plugin/user.rs
+++ b/src/meta_plugin/user.rs
@@ -58,7 +58,7 @@ impl MetaPlugin for UserMetaPlugin {
         for (name, value) in values {
             if let Some(meta_data) = crate::meta_plugin::process_metadata_outputs(
                 name, 
-                value, 
+                serde_yaml::Value::String(value), 
                 self.base.outputs()
             ) {
                 metadata.push(meta_data);