diff --git a/spec/mstrap/configuration_spec.cr b/spec/mstrap/configuration_spec.cr
index 2bebec7..58b2f09 100644
--- a/spec/mstrap/configuration_spec.cr
+++ b/spec/mstrap/configuration_spec.cr
@@ -34,7 +34,7 @@ def delete_profile(name)
 end
 
 Spectator.describe MStrap::Configuration do
-  let(config_def) do
+  let(config_def_v1_0) do
     MStrap::Defs::ConfigDef.from_hcl(<<-HCL)
       version = "1.0"
 
@@ -50,6 +50,8 @@ Spectator.describe MStrap::Configuration do
     HCL
   end
 
+  let(config_def) { config_def_v1_0 }
+
   let(personal_profile_def) do
     MStrap::Defs::ProfileDef.from_hcl(<<-HCL)
       version = "1.0"
@@ -315,6 +317,44 @@ Spectator.describe MStrap::Configuration do
     end
   end
 
+  describe "#runtime_manager" do
+    context "for v1.0 configs" do
+      subject { MStrap::Configuration.new(config_def_v1_0) }
+
+      it "defaults to asdf" do
+        expect(subject.runtime_manager).to be_a(MStrap::RuntimeManagers::ASDF)
+      end
+    end
+
+    context "for v1.1 configs" do
+      let(config_def_v1_1) do
+        MStrap::Defs::ConfigDef.from_hcl(<<-HCL)
+          version = "1.1"
+
+          runtimes {
+            default_manager = "mise"
+          }
+
+          user {
+            name = "Reginald Testington"
+            email = "reginald@testington.biz"
+          }
+
+          profile "personal" {
+            url = "ssh://git@gitprovider.biz/reggiemctest/mstrap-personal.git"
+          }
+
+        HCL
+      end
+
+      subject { MStrap::Configuration.new(config_def_v1_1) }
+
+      it "can be set through runtimes.default_manager" do
+        expect(subject.runtime_manager).to be_a(MStrap::RuntimeManagers::Mise)
+      end
+    end
+  end
+
   describe "#save!" do
     it "saves the loaded configuration back to disk" do
       subject = MStrap::Configuration.new(config_def)
diff --git a/src/mstrap/configuration.cr b/src/mstrap/configuration.cr
index fdc22bc..b5e276b 100644
--- a/src/mstrap/configuration.cr
+++ b/src/mstrap/configuration.cr
@@ -44,7 +44,7 @@ module MStrap
       @loaded_profiles = [] of Defs::ProfileDef
       @known_profile_configs = config.profiles + [DEFAULT_PROFILE_CONFIG_DEF]
       @resolved_profile = Defs::ProfileDef.new
-      @runtime_manager = RuntimeManager.for(config.runtime_manager)
+      @runtime_manager = RuntimeManager.for(config.runtimes.default_manager)
       @user = User.new(user: config.user)
     end
 
diff --git a/src/mstrap/defs/config_def.cr b/src/mstrap/defs/config_def.cr
index 01cc90c..e473808 100644
--- a/src/mstrap/defs/config_def.cr
+++ b/src/mstrap/defs/config_def.cr
@@ -9,13 +9,13 @@ module MStrap
       @[HCL::Block(key: "profile")]
       property profiles = [] of ::MStrap::Defs::ProfileConfigDef
 
-      @[HCL::Attribute]
-      property runtime_manager = "asdf"
+      @[HCL::Block]
+      property runtimes = ::MStrap::Defs::RuntimesConfigDef.new
 
       @[HCL::Block]
       property user = ::MStrap::Defs::UserDef.new
 
-      def_equals_and_hash @version, @profiles, @user
+      def_equals_and_hash @version, @profiles, @runtimes, @user
 
       def self.from_url(url : String)
         HTTP::Client.get(url, tls: MStrap.tls_client) do |response|
@@ -23,7 +23,11 @@ module MStrap
         end
       end
 
-      def initialize(@user = UserDef.new, @profiles = Array(ProfileConfigDef).new)
+      def initialize(
+        @user = UserDef.new,
+        @profiles = Array(ProfileConfigDef).new,
+        @runtimes = RuntimesConfigDef.new
+      )
       end
     end
   end
diff --git a/src/mstrap/defs/runtimes_config_def.cr b/src/mstrap/defs/runtimes_config_def.cr
new file mode 100644
index 0000000..0df0c6e
--- /dev/null
+++ b/src/mstrap/defs/runtimes_config_def.cr
@@ -0,0 +1,15 @@
+module MStrap
+  module Defs
+    class RuntimesConfigDef
+      include HCL::Serializable
+
+      @[HCL::Attribute]
+      property default_manager = "asdf"
+
+      def_equals_and_hash @default_manager
+
+      def initialize
+      end
+    end
+  end
+end
diff --git a/src/mstrap/runtime_managers/mise.cr b/src/mstrap/runtime_managers/mise.cr
index fe2c2b0..a94f5f2 100644
--- a/src/mstrap/runtime_managers/mise.cr
+++ b/src/mstrap/runtime_managers/mise.cr
@@ -18,7 +18,7 @@ module MStrap
         end
 
         cmd_args = ["exec"] + exec_args + ["--", command]
-        cmd_args += args unless !args
+        cmd_args += args if args
 
         if command && (!args || args.empty?)
           cmd "mise #{cmd_args.join(' ')}", quiet: true