diff --git a/CHANGELOG.md b/CHANGELOG.md
index b24adb0..099e627 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 # Unreleased
 - Fixes issue when getting streams that have multiple filters on single user property
+- Fixes issue where upper case file names would not be matched in `parse` 
 
 # v0.24.0
 - BREAKING: the `--context` option is now required. Users need to opt
diff --git a/cli/src/commands/parse/emls.rs b/cli/src/commands/parse/emls.rs
index a728323..e18d2a5 100644
--- a/cli/src/commands/parse/emls.rs
+++ b/cli/src/commands/parse/emls.rs
@@ -50,7 +50,7 @@ pub fn parse(client: &Client, args: &ParseEmlArgs, pool: &mut Pool) -> Result<()
         ensure_uip_user_consents_to_ai_unit_charge(client.base_url())?;
     }
 
-    let eml_paths = get_files_in_directory(directory, "eml")?;
+    let eml_paths = get_files_in_directory(directory, "eml", true)?;
     let statistics = Arc::new(Statistics::new());
     let _progress = get_progress_bar(eml_paths.len() as u64, &statistics);
 
diff --git a/cli/src/commands/parse/mod.rs b/cli/src/commands/parse/mod.rs
index 04379b1..f3b073d 100644
--- a/cli/src/commands/parse/mod.rs
+++ b/cli/src/commands/parse/mod.rs
@@ -84,11 +84,21 @@ impl Statistics {
     }
 }
 
-pub fn get_files_in_directory(directory: &PathBuf, extension: &str) -> Result<Vec<DirEntry>> {
+pub fn get_files_in_directory(
+    directory: &PathBuf,
+    target_extension: &str,
+    case_insensitive: bool,
+) -> Result<Vec<DirEntry>> {
     Ok(std::fs::read_dir(directory)?
         .filter_map(|path| {
             let path = path.ok()?;
-            if path.path().extension().is_some_and(|msg| msg == extension) {
+            if path.path().extension().is_some_and(|extension| {
+                if case_insensitive {
+                    *extension.to_ascii_lowercase() == *target_extension.to_ascii_lowercase()
+                } else {
+                    extension == target_extension
+                }
+            }) {
                 Some(path)
             } else {
                 None
diff --git a/cli/src/commands/parse/msgs.rs b/cli/src/commands/parse/msgs.rs
index a20aeee..19f598b 100644
--- a/cli/src/commands/parse/msgs.rs
+++ b/cli/src/commands/parse/msgs.rs
@@ -230,7 +230,7 @@ pub fn parse(client: &Client, args: &ParseMsgArgs) -> Result<()> {
         ensure_uip_user_consents_to_ai_unit_charge(client.base_url())?;
     }
 
-    let msg_paths = get_files_in_directory(directory, "msg")?;
+    let msg_paths = get_files_in_directory(directory, "msg", true)?;
     let statistics = Arc::new(Statistics::new());
     let _progress = get_progress_bar(msg_paths.len() as u64, &statistics);
     let source = client.get_source(source.clone())?;