diff --git a/src/main.rs b/src/main.rs
index 320f63c..18277e0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -307,7 +307,7 @@ async fn actual_main(mut cli_app: Ferium) -> Result<()> {
                     .await
                     {
                         return Err(
-                            if err.to_string() == ferinth::Error::InvalidIDorSlug.to_string() {
+                            if let Some(&ferinth::Error::InvalidIDorSlug) = err.downcast_ref() {
                                 anyhow!("Invalid identifier")
                             } else {
                                 err
diff --git a/src/subcommands/modpack/delete.rs b/src/subcommands/modpack/delete.rs
index e0850ec..c0f03c9 100644
--- a/src/subcommands/modpack/delete.rs
+++ b/src/subcommands/modpack/delete.rs
@@ -18,7 +18,7 @@ pub fn delete(
         config
             .modpacks
             .iter()
-            .position(|modpack| modpack.name == modpack_name)
+            .position(|modpack| modpack.name.eq_ignore_ascii_case(&modpack_name))
             .context("The modpack name provided does not exist")?
     } else {
         let modpack_names = config
diff --git a/src/subcommands/modpack/switch.rs b/src/subcommands/modpack/switch.rs
index 8422385..2a98900 100644
--- a/src/subcommands/modpack/switch.rs
+++ b/src/subcommands/modpack/switch.rs
@@ -14,7 +14,7 @@ pub fn switch(config: &mut Config, modpack_name: Option<String>) -> Result<()> {
         match config
             .modpacks
             .iter()
-            .position(|modpack| modpack.name == modpack_name)
+            .position(|modpack| modpack.name.eq_ignore_ascii_case(&modpack_name))
         {
             Some(selection) => {
                 config.active_modpack = selection;
diff --git a/src/subcommands/profile/switch.rs b/src/subcommands/profile/switch.rs
index 3ca95a8..fb01e18 100644
--- a/src/subcommands/profile/switch.rs
+++ b/src/subcommands/profile/switch.rs
@@ -13,7 +13,7 @@ pub fn switch(config: &mut Config, profile_name: Option<String>) -> Result<()> {
         match config
             .profiles
             .iter()
-            .position(|profile| profile.name == profile_name)
+            .position(|profile| profile.name.eq_ignore_ascii_case(&profile_name))
         {
             Some(selection) => {
                 config.active_profile = selection;
diff --git a/src/subcommands/upgrade.rs b/src/subcommands/upgrade.rs
index bfc13d5..778fb62 100644
--- a/src/subcommands/upgrade.rs
+++ b/src/subcommands/upgrade.rs
@@ -115,7 +115,11 @@ pub async fn upgrade(profile: &Profile) -> Result<()> {
         for file in read_dir(profile.output_dir.join("user"))? {
             let file = file?;
             let path = file.path();
-            if path.is_file() && path.extension().is_some_and(|ext| ext == "jar") {
+            if path.is_file()
+                && path
+                    .extension()
+                    .is_some_and(|ext| ext.eq_ignore_ascii_case("jar"))
+            {
                 to_install.push((file.file_name(), path));
             }
         }