Change CheckBox Label Text from bold to normal using CSS in ASP.Net

I have three checkbox controls online but the text of these appears in bold, as I can put the text in normal letters, not in bold.

        <div class="col-sm-3" >
            <!--  <input type="password" class="form-control inputstl" id="password1" placeholder="Password here"> -->
            <div class="checkbox-inline">
            <label >
            <!--  <input type="checkbox"> Remember me -->
                <asp:CheckBox ID="chkRegistrar" runat="server" Text="Registrar" Enabled="False" />
            </label>
          </div>
            <div class="checkbox-inline">
            <label >
            <!--  <input type="checkbox"> Remember me -->
                <asp:CheckBox ID="chkActualizar" runat="server" Text="Actualizar" Enabled="False" />
            </label>
          </div>
              <div class="checkbox-inline">
            <label>
            <!--  <input type="checkbox"> Remember me -->
                <asp:CheckBox ID="chkPBaja" runat="server" Text="Baja" Enabled="False" />
            </label>
          </div>           
        </div>