diff --git a/libisoburn/libisoburn.h b/libisoburn/libisoburn.h
index 83700e5f..b50f1ddf 100644
--- a/libisoburn/libisoburn.h
+++ b/libisoburn/libisoburn.h
@@ -39,7 +39,7 @@ necessary interface objects and attaching them to the right places.
 
                           Wrapper functions 
 
-The priciple of this frontend is that you may use any call of libisofs or
+The principle of this frontend is that you may use any call of libisofs or
 libburn unless it has a  isoburn_*()  wrapper listed in the following function
 documentation.
 
@@ -257,7 +257,7 @@ void isoburn_version(int *major, int *minor, int *micro);
 */
 #define isoburn_libburn_req_major  1
 #define isoburn_libburn_req_minor  4
-#define isoburn_libburn_req_micro  4
+#define isoburn_libburn_req_micro  5
 
 /** The minimum compile time requirements of libisoburn towards libjte are
     the same as of a suitable libisofs towards libjte.
@@ -443,7 +443,7 @@ int isoburn_drive_scan_and_grab(struct burn_drive_info *drive_infos[],
                         filesystems
                   bit7= pretend read-only profile and scan for table of content
                   bit8= re-assess already acquired (*drive_infos)[0] rather
-                        than aquiring adr
+                        than acquiring adr
                         @since 1.1.8
                   bit9= when scanning for ISO 9660 sessions  by bit3:
                         Do not demand a valid superblock at LBA 0, ignore it in
@@ -534,7 +534,7 @@ void isoburn_disc_erase(struct burn_drive *drive, int fast);
 
 
 /** Set up isoburn_disc_get_msc1() to return a fabricated value.
-    This makes only sense between aquiring the drive and reading the
+    This makes only sense between acquiring the drive and reading the
     image. After isoburn_read_image() it will confuse the coordination
     of libisoburn and libisofs.
     Note: Sessions and tracks are counted beginning with 1, not with 0.
@@ -1702,7 +1702,7 @@ int isoburn_igopt_get_pvd_times(struct isoburn_imgen_opts *opts,
                       char uuid[17]);
 
 
-/** Associate a libjte environment object to the upcomming write run.
+/** Associate a libjte environment object to the upcoming write run.
     libjte implements Jigdo Template Extraction as of Steve McIntyre and
     Richard Atterer.
     A non-NULL libjte_handle will cause failure to write if libjte was not
@@ -2298,7 +2298,7 @@ off_t isoburn_disc_available_space(struct burn_drive *d,
 
 
 /** Obtain the start block number of the most recent session on the medium. In
-    case of random access media this will normally be 0. Successfull return is
+    case of random access media this will normally be 0. Successful return is
     not a guarantee that there is a ISO-9660 image at all. The call will fail,
     nevertheless,if isoburn_disc_get_status() returns not BURN_DISC_APPENDABLE
     or BURN_DISC_FULL.