diff --git a/INSTALL b/INSTALL
index 0ee3380..0eac6f9 100644
--- a/INSTALL
+++ b/INSTALL
@@ -6,7 +6,7 @@ Build Instructions
 
   - A POSIX-compliant C development environment
   - GNU make version 4.0 or later
-  - skalibs version 2.3.8.0 or later: http://skarnet.org/software/skalibs/
+  - skalibs version 2.3.9.0 or later: http://skarnet.org/software/skalibs/
 
 
 * Standard usage
diff --git a/src/libslicd/bitarray_clearsetn.c b/src/libslicd/bitarray_clearsetn.c
deleted file mode 100644
index 1c927cb..0000000
--- a/src/libslicd/bitarray_clearsetn.c
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * slicd - Copyright (C) 2015 Olivier Brunel
- *
- * bitarray_clearsetn.c
- * Copyright (C) 2015 Olivier Brunel <jjk@jjacky.com>
- *
- * This file is part of slicd.
- *
- * slicd is free software: you can redistribute it and/or modify it under the
- * terms of the GNU General Public License as published by the Free Software
- * Foundation, either version 3 of the License, or (at your option) any later
- * version.
- *
- * slicd is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- * FOR A PARTICULAR PURPOSE.
- * See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * slicd. If not, see http://www.gnu.org/licenses/
- */
-/* Based on bitarray_clearsetn.c from skalibs; ISC license
- * Copyright (c) 2011-2015 Laurent Bercot <ska-skaware@skarnet.org> */
-
-#include <skalibs/bitarray.h>
-
-void _bitarray_clearsetn (register unsigned char *s,
-                          register unsigned int a,
-                          register unsigned int b,
-                          register unsigned int h)
-{
- if (!b) return ;
-  b += a ;
-  if ((a >> 3) == ((b-1) >> 3))
-  {
-    register unsigned char mask = ((1 << (a & 7)) - 1) ^ ((1 << ((b & 7) ? b & 7 : 8)) - 1) ;
-    if (h) s[a>>3] |= mask ; else s[a>>3] &= ~mask ;
-  }
-  else
-  {
-    register unsigned char mask = ~((1 << (a & 7)) - 1) ;
-    register unsigned int i = (a>>3) + 1 ;
-    if (h) s[a>>3] |= mask ; else s[a>>3] &= ~mask ;
-    mask = h ? 0xff : 0x00 ;
-    for (; i < b>>3 ; i++) s[i] = mask ;
-    mask = (1 << (b & 7)) - 1 ;
-    if (h) s[b>>3] |= mask ; else s[b>>3] &= ~mask ;
-  }
-}
diff --git a/src/libslicd/bitarray_firstclear_skip.c b/src/libslicd/bitarray_firstclear_skip.c
deleted file mode 100644
index 97aae02..0000000
--- a/src/libslicd/bitarray_firstclear_skip.c
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * slicd - Copyright (C) 2015 Olivier Brunel
- *
- * bitarray_firstclear_skip.c
- * Copyright (C) 2015 Olivier Brunel <jjk@jjacky.com>
- *
- * This file is part of slicd.
- *
- * slicd is free software: you can redistribute it and/or modify it under the
- * terms of the GNU General Public License as published by the Free Software
- * Foundation, either version 3 of the License, or (at your option) any later
- * version.
- *
- * slicd is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- * FOR A PARTICULAR PURPOSE.
- * See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * slicd. If not, see http://www.gnu.org/licenses/
- */
-/* Based on bitarray_firstclear.c from skalibs; ISC license
- * Copyright (c) 2011-2015 Laurent Bercot <ska-skaware@skarnet.org> */
-
-#include <skalibs/bitarray.h>
-
-unsigned int
-_bitarray_firstclear_skip (register unsigned char const *s, unsigned int max, unsigned int skip)
-{
-    unsigned int n = bitarray_div8 (max);
-    register unsigned int i = bitarray_div8 (skip);
-
-    if (i && s[i - 1] != 0xffU)
-    {
-        register unsigned int j = skip;
-
-        skip = i << 3;
-        if (skip > max)
-            skip = max;
-        while ((j < skip) && bitarray_peek (s, j))
-            ++j;
-        if (j < skip)
-            return j;
-    }
-
-    for ( ; i < n ; ++i)
-        if (s[i] != 0xffU)
-            break;
-
-    if (i == n)
-        return max;
-
-    i <<= 3;
-    while ((i < max) && bitarray_peek (s, i))
-        ++i;
-    return i;
-}
diff --git a/src/libslicd/bitarray_firstset_skip.c b/src/libslicd/bitarray_firstset_skip.c
deleted file mode 100644
index d6236cb..0000000
--- a/src/libslicd/bitarray_firstset_skip.c
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * slicd - Copyright (C) 2015 Olivier Brunel
- *
- * bitarray_firstset_skip.c
- * Copyright (C) 2015 Olivier Brunel <jjk@jjacky.com>
- *
- * This file is part of slicd.
- *
- * slicd is free software: you can redistribute it and/or modify it under the
- * terms of the GNU General Public License as published by the Free Software
- * Foundation, either version 3 of the License, or (at your option) any later
- * version.
- *
- * slicd is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- * FOR A PARTICULAR PURPOSE.
- * See the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * slicd. If not, see http://www.gnu.org/licenses/
- */
-/* Based on bitarray_firstset.c from skalibs; ISC license
- * Copyright (c) 2011-2015 Laurent Bercot <ska-skaware@skarnet.org> */
-
-#include <skalibs/bitarray.h>
-
-unsigned int
-_bitarray_firstset_skip (register unsigned char const *s, unsigned int max, unsigned int skip)
-{
-    unsigned int n = bitarray_div8 (max);
-    register unsigned int i = bitarray_div8 (skip);
-
-    if (i && s[i - 1])
-    {
-        register unsigned int j = skip;
-
-        skip = i << 3;
-        if (skip > max)
-            skip = max;
-        while ((j < skip) && !bitarray_peek (s, j))
-            ++j;
-        if (j < skip)
-            return j;
-    }
-
-    for ( ; i < n ; ++i)
-        if (s[i])
-            break;
-
-    if (i == n)
-        return max;
-
-    i <<= 3;
-    while ((i < max) && !bitarray_peek (s, i))
-        ++i;
-    return i;
-}
diff --git a/src/libslicd/deps-lib/slicd b/src/libslicd/deps-lib/slicd
index 7410daa..0165633 100644
--- a/src/libslicd/deps-lib/slicd
+++ b/src/libslicd/deps-lib/slicd
@@ -1,6 +1,3 @@
-bitarray_clearsetn.o
-bitarray_firstclear_skip.o
-bitarray_firstset_skip.o
 errmsg.o
 slicd_add_job_from_cronline.o
 slicd_die_usage.o
diff --git a/src/libslicd/slicd_job.c b/src/libslicd/slicd_job.c
index 6642ed5..a35a50e 100644
--- a/src/libslicd/slicd_job.c
+++ b/src/libslicd/slicd_job.c
@@ -27,16 +27,6 @@
 #include <slicd/fields.h>
 #include <slicd/err.h>
 
-extern void _bitarray_clearsetn (register unsigned char *s,
-                                 register unsigned int a,
-                                 register unsigned int b,
-                                 register unsigned int h);
-extern unsigned int _bitarray_firstset_skip (register unsigned char const *s,
-                                             unsigned int max,
-                                             unsigned int skip);
-extern unsigned int _bitarray_firstclear_skip (register unsigned char const *s,
-                                               unsigned int max,
-                                               unsigned int skip);
 
 #define ensure_in_range(field,n) \
     if (n < 0 || n > _slicd_fields[field].max)  \
@@ -70,7 +60,7 @@ slicd_job_set_days_combo (slicd_job_t    *job,
 {
     assert (job != NULL);
 
-    _bitarray_clearsetn (job->bits, _SLICD_BIT_DAYS_COMBO, 1, what);
+    bitarray_clearsetn (job->bits, _SLICD_BIT_DAYS_COMBO, 1, what);
     return 0;
 }
 
@@ -94,7 +84,7 @@ slicd_job_clearset (slicd_job_t    *job,
     if (to < from)
         return -SLICD_ERR_INVALID_RANGE;
 
-    _bitarray_clearsetn (job->bits, _slicd_fields[field].offset + from, to - from + 1, what);
+    bitarray_clearsetn (job->bits, _slicd_fields[field].offset + from, to - from + 1, what);
     return 0;
 }
 
@@ -123,9 +113,9 @@ slicd_job_first (slicd_job_t    *job,
     from += _slicd_fields[field].offset;
     to += _slicd_fields[field].offset;
     if (what)
-        r = _bitarray_firstset_skip (job->bits, to + 1, from);
+        r = bitarray_firstset_skip (job->bits, to + 1, from);
     else
-        r = _bitarray_firstclear_skip (job->bits, to + 1, from);
+        r = bitarray_firstclear_skip (job->bits, to + 1, from);
 
     return _slicd_fields[field].adjust + r - _slicd_fields[field].offset;
 }