diff --git a/ChangeLog b/ChangeLog
index 52ec606..ec6410d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -32,6 +32,8 @@
      RSA is disabled, larger if POLARSSL_MPI_MAX_SIZE is larger.
    * ssl_read() now returns POLARSSL_ERR_NET_WANT_READ rather than
      POLARSSL_ERR_SSL_UNEXPECTED_MESSAGE on harmless alerts.
+   * POLARSSL_MPI_MAX_SIZE now defaults to 1024 in order to allow 8192 bits
+     RSA keys.
 
 = PolarSSL 1.3.8 released 2014-07-11
 Security
diff --git a/include/polarssl/bignum.h b/include/polarssl/bignum.h
index cd7592c..992ed8e 100644
--- a/include/polarssl/bignum.h
+++ b/include/polarssl/bignum.h
@@ -90,7 +90,7 @@
  * Note: Calculations can results temporarily in larger MPIs. So the number
  * of limbs required (POLARSSL_MPI_MAX_LIMBS) is higher.
  */
-#define POLARSSL_MPI_MAX_SIZE                              512      /**< Maximum number of bytes for usable MPIs. */
+#define POLARSSL_MPI_MAX_SIZE                              1024     /**< Maximum number of bytes for usable MPIs. */
 #endif /* !POLARSSL_MPI_MAX_SIZE */
 
 #define POLARSSL_MPI_MAX_BITS                              ( 8 * POLARSSL_MPI_MAX_SIZE )    /**< Maximum number of bits for usable MPIs. */
diff --git a/include/polarssl/config.h b/include/polarssl/config.h
index d43365f..50b4e33 100644
--- a/include/polarssl/config.h
+++ b/include/polarssl/config.h
@@ -2113,7 +2113,7 @@
 
 /* MPI / BIGNUM options */
 //#define POLARSSL_MPI_WINDOW_SIZE            6 /**< Maximum windows size used. */
-//#define POLARSSL_MPI_MAX_SIZE             512 /**< Maximum number of bytes for usable MPIs. */
+//#define POLARSSL_MPI_MAX_SIZE            1024 /**< Maximum number of bytes for usable MPIs. */
 
 /* CTR_DRBG options */
 //#define CTR_DRBG_ENTROPY_LEN               48 /**< Amount of entropy used per seed by default (48 with SHA-512, 32 with SHA-256) */
diff --git a/tests/data_files/mpi_10 b/tests/data_files/mpi_10
index eaa8cab..ab5e0d3 100644
--- a/tests/data_files/mpi_10
+++ b/tests/data_files/mpi_10
@@ -1 +1 @@
-643808006803554439230129854961492699151386107534013432918073439524138264842370630061369715394739134090922937332590384720397133335969549256322620979036686633213903952966175107096769180017646161851573147596390153
+label_1234567890=643808006803554439230129854961492699151386107534013432918073439524138264842370630061369715394739134090922937332590384720397133335969549256322620979036686633213903952966175107096769180017646161851573147596390153
diff --git a/tests/data_files/mpi_too_big b/tests/data_files/mpi_too_big
index 2d98757..ca62352 100644
--- a/tests/data_files/mpi_too_big
+++ b/tests/data_files/mpi_too_big
@@ -1 +1 @@
-64380800680355443923012985496149269915138610753401343291807343952413826484237063006136971539473913409092293733259038472039713333596954925632262097903668663321390395296617510709676918001764616185157314759639015364380800680355443923012985496149269915138610753401343291807343952413826484237063006136971539473913409092293733259038472039713333596954925632262097903668663321390395296617510709676918001764616185157314759639015364380800680355443923012985496149269915138610753401343291807343952413826484237063006136971539473913409092293733259038472039713333596954925632262097903668663321390395296617510709676918001764616185157314759639015364380800680355443923012985496149269915138610753401343291807343952413826484237063006136971539473913409092293733259038472039713333596954925632262097903668663321390395296617510709676918001764616185157314759639015364380800680355443923012985496149269915138610753401343291807343952413826484237063006136971539473913409092293733259038472039713333596954925632262097903668663321390395296617510709676918001764616185157314759639015364380800680355443923012985496149269915138610753401343291807343952413826484237063006136971539473913409092293733259038472039713333596954925632262097903668663321390395296617510709676918001764616185157
+label_1234567890=1090748135619415929462984244733782862448264161996232692431832786189721331849119295216264234525201987223957291796157025273109870820177184063610979765077554799078906298842192989538609825228048205159696851613591638196771886542609324560121290553901886301017900252535799917200010079600026535836800905297805880952350501630195475653911005312364560014847426035293551245843928918752768696279344088055617515694349945406677825140814900616105920256438504578013326493565836047242407382442812245131517757519164899226365743722432277368075027627883045206501792761700945699168497257879683851737049996900961120515655050115561271491492515342105748966629547032786321505730828430221664970324396138635251626409516168005427623435996308921691446181187406395310665404885739434832877428167407495370993511868756359970390117021823616749458620969857006263612082706715408157066575137281027022310927564910276759160520878304632411049364568754920967322982459184763427383790272448438018526977764941072715611580434690827459339991961414242741410599117426060556483763756314527611362658628383368621157993638020878537675545336789915694234433955666315070087213535470255670312004130725495834508357439653828936077080978550578912967907352780054935621561090795845172954115972927479877527738560008204118558930004777748727761853813510493840581861598652211605960308356405941821189714037868726219481498727603653616298856174822413033485438785324024751419417183012281078209729303537372804574372095228703622776363945290869806258422355148507571039619387449629866808188769662815778153079393179093143648340761738581819563002994422790754955061288818308430079648693232179158765918035565216157115402992120276155607873107937477466841528362987708699450152031231862594203085693838944657061346236704234026821102958954951197087076546186622796294536451620756509351018906023773821539532776208676978589731966330308893304665169436185078350641568336944530051437491311298834367265238595404904273455928723949525227184617404367854754610474377019768025576605881038077270707717942221977090385438585844095492116099852538903974655703943973086090930596963360767529964938414598185705963754561497355827813623833288906309004288017321424808663962671333528009232758350873059614118723781422101460198615747386855096896089189180441339558524822867541113212638793675567650340362970031930023397828465318547238244232028015189689660418822976000815437610652254270163595650875433851147123214227266605403581781469090806576468950587661997186505665475715792896
diff --git a/tests/suites/test_suite_rsa.data b/tests/suites/test_suite_rsa.data
index 5e9afe3..131e273 100644
--- a/tests/suites/test_suite_rsa.data
+++ b/tests/suites/test_suite_rsa.data
@@ -294,11 +294,11 @@
 RSA Check Public key #5 (N smaller than 128 bits)
 rsa_check_pubkey:16:"7edcba9876543210deadbeefcafe4321":16:"3":POLARSSL_ERR_RSA_KEY_CHECK_FAILED
 
-RSA Check Public key #6 (N exactly 4096 bits)
-rsa_check_pubkey:16:"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":16:"3":0
+RSA Check Public key #6 (N exactly 8192 bits)
+rsa_check_pubkey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
 
-RSA Check Public key #7 (N larger than 4096 bits)
-rsa_check_pubkey:16:"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":16:"3":POLARSSL_ERR_RSA_KEY_CHECK_FAILED
+RSA Check Public key #7 (N larger than 8192 bits)
+rsa_check_pubkey:16:"01631CD83F3F2D67FA52E13B44416EA65043A322ECD65467558EACD4C6B6D92DA7471D2DBD58E6921F9465C4900E92DFC6EB35C90637285A7E1F3D27C1C32FD6A5CB324D8253C6B2E480B63F66E3B09F4300C3E683011C7803BDEAD682F0F55473FC8A187734573A11ECDCE802022F539BC2074E94703C23E48FF8AE35702352E70AF921B42E6A143A3EFEE20DF77A97AA703AA271CE96EB78062452D87A4ADCACF83FFB9683818BF2ED234D0ECFB1B935827708050C4D007215D7A028152798045AF6A0B741A7B22F3FCCEBC26D285B9AA22CEF858858702BAE7D945FA0C45E2D8AADFF2FD0A64DF02C241F871C799AD73738E626D9A6D4BFFBCE000C4087F0CE74EF21526402FDCD07649175122697FD01041B84AD0A3FEDABD5C25E953686B2272F8C8B748A486F54CB767A1C79CA499B2C9A300AC8A214A0BFA06280A9235D5B7AFB8A76FFDD78FC72038C5B809569A6125D6A588684A16D222EF93F2469EA78948037957DE9B449AB722044FDFF3B6AC89367D72F0CF3ED1F85EDFD0DE3EEEDD39F6EFD68A0368F83B389B7A7B9C7713F4148F53E82CDF6D9CC002A3A16F1E6A1D78C48CE7849584164661664153A499ACAE5927728B2F1A2E911648676DF316DFCBF5E44F393B7B296A4A21ED59744E3855FCD4A21F2B42CFE5C52860B244D467103107E3DC40A82077269897528CCBF80B2F216A535C52A6A2643E64B53276A1B63348038706328FE369AE2409568160481C07A3ED5B0198EC6CC07F8F250B1DE0D97110F834AA3D1C0862FB719393EA08D530225CE0647FD5488F483FA065196D1160FAFA54CD3FF63B6ADDBE84D09F3CFF98F22CC71DE2FC19735126C3BBA9A2C293D1DB118F0512C144C1C616492BE0D19BFD245955840F640EBE6FCFF2830C683852046F36C3CDA4F4460ABA4B2FEEB700C9DD80418C42673858CDD11E70682D5A41ED7D8010EC7DD5B57B4E206F84DB8A430B246002FEA49AFF45940B1F18AE28863F5AA41D3B42ABCD3D1BAB7644B86E060865997E1BA23A768F233D8A859332F8B9D5D1633F9C462328C17E2B07D6DFD813C94D675873592E5CBB001C112A790B10B9F9E07BE105C4FD328C7E3887C3EF13E8ECE6106B73A3341AF200D8663BDF96FFDB6F794FBB04D976B87423A868882F15CAE8DC9F6CAF4917EFC844E74BAD48F21E34530CB4E20006444706FC95658735553CA99E18F0E820D78DEF8FB84034B10CE44B1AE36B50147558415E5E78A77E2FC7C8C580B54CCC40EE3904C04950846A6D51BF5C80E0B6E2ADC4989DA1D3DD01F99AA369C2E6B53394BA0CB5E6E811BFA004A5B3B3C34C60433AB5EB0EC8050246B9AF10B49EAA51487CCE0C4C8F4CDAF926D582D7E4924C33765E00AC952A38669150EA322CDF886B46DE4D0970A060B670D50C9BF3D2020B529838E192EF92BFE2F06FDF1D5":16:"010001":POLARSSL_ERR_RSA_KEY_CHECK_FAILED
 
 RSA Check Public key #8 (E exactly 2 bits)
 rsa_check_pubkey:16:"fedcba9876543210deadbeefcafe4321":16:"3":0